Two anti-personnel bombs — the second clearly desgned to kill arriving law enforcement and rescue workers — exploded outside an abortion clinic in Sandy Springs, Ga., Jan. 16, 1997. (AP Wide World Photos)

January 16, 1997
Two anti-personnel bombs — the second clearly designed to kill arriving law enforcement and rescue workers — explode outside an abortion clinic in Sandy Springs, Ga., a suburb of Atlanta. Seven people are injured. Letters signed by the "Army of God" claim responsibility for this attack and another, a month later, at an Atlanta gay bar. Authorities later learn that these attacks, the 1998 bombing of a Birmingham, Ala., abortion clinic and the 1996 Atlanta Olympics bombing, were all carried out by Eric Robert Rudolph, who is captured in 2003 after five years on the run. Rudolph avoids the death penalty by pleading guilty in exchange for a life sentence, but simultaneously releases a defiant statement defending his attacks.

January 22, 1997
Authorities raid the Martinton, Ill., home of former Marine Ricky Salyers, an alleged Ku Klux Klan member, discovering 35,000 rounds of heavy ammunition, armor piercing shells, smoke and tear gas grenades, live shells for grenade launchers, artillery shells and other military gear. Salyers was discharged earlier from the Marines, where he taught demolitions and sniping, after tossing a live grenade (with the pin still in) at state police officers serving him with a search warrant in 1995. Following the 1997 raid, Salyers, an alleged member of the underground Black Dawn group of extremists in the military, is sentenced to serve three years for weapons violations. He is released from prison in 2000.

March 26, 1997
Militia activist Brendon Blasz is arrested in Kalamazoo, Mich., and charged with making pipe bombs and other illegal explosives. Prosecutors say Blasz plotted to bomb the federal building in Battle Creek, the IRS building in Portage, a Kalamazoo television station and federal armories. But they recommend leniency on his explosives conviction after Blasz renounces his antigovernment beliefs and cooperates with them. In August, he is sentenced to more than three years in federal prison. Blasz is released in early 2000.

April 22, 1997
Three Ku Klux Klan members are arrested in a plot to blow up a natural gas refinery outside Fort Worth, Texas, after local Klan leader Robert Spence gets cold feet and goes to the FBI. The three, along with a fourth arrested later, expected to kill a huge number of people with the blast — authorities later say as many as 30,000 might have died — which was to serve, incredibly, as a diversion for a simultaneous armored car robbery. Among the victims would have been children at a nearby school. All four plead guilty to conspiracy charges and are sentenced to terms of up to 20 years. Spence enters the Witness Protection Program. Carl Jay Waskom Jr. is released in June 2004. Shawn and Catherine Adams, a couple, are expected to be freed in 2006, and Edward Taylor Jr. in early 2007.

April 23, 1997
Florida police arrest Todd Vanbiber, a member of the neo-Nazi National Alliance's Tampa unit and the shadowy League of the Silent Soldier, after he accidentally sets off pipe bombs he was building, blasting shrapnel into his own face. He is accused of plotting to use the bombs on the approach to Disney World to divert attention from a planned string of bank robberies. Vanbiber pleads guilty to weapons and explosives charges and is sentenced to more than six years in federal prison. He is released in 2002. Within two years, Vanbiber is posting messages on neo-Nazi Internet sites boasting that he has built over 300 bombs successfully and only made one error, and describing mass murderer Timothy McVeigh as a hero.

April 27, 1997
After a cache of explosives stored in a tree blows up near Yuba City, Calif., police arrest Montana Freemen supporter William Robert Goehler. Investigators looking into the blast arrest two Goehler associates, one of them a militia leader, after finding 500 pounds of petrogel explosives — enough to level three city blocks — in a motor home parked outside their residence. Six others are arrested on related charges. Goehler, with previous convictions for rape, burglary and assault, is sentenced to 25 years to life in prison.

May 3, 1997
Antigovernment extremists set fire to the IRS office in Colorado Springs, Colo., causing $2.5 million in damage and injuring a firefighter. Federal agents later arrest five men in connection with the arson, which is conceived as a protest against the tax system. Ringleader James Cleaver, former national director of the antigovernment Sons of Liberty group, is eventually sentenced to 33 years in prison, while accomplice Jack Dowell is sentenced in a separate trial to serve 30 years. Both are ordered to pay $2.2 million in restitution. Dowell's cousin is acquitted of all charges, while two other suspects, Ronald Sherman and Thomas Shafer, plead guilty to perjury charges in connection with the case.

July 4, 1997
Militiaman Bradley Playford Glover and another heavily armed antigovernment activist are arrested before dawn near Fort Hood, in central Texas, just hours before they planned to invade the Army base and slaughter foreign troops they mistakenly believed were housed there. In the next few days, five other people are arrested in several states for their alleged roles in the plot to invade a series of military bases where the group believes United Nations forces are massing for an assault on Americans. All seven are part of a splinter group of the Third Continental Congress, a kind of militia government-in-waiting. In the end, Glover is sentenced to two years on Kansas weapons charges, to be followed by a five-year federal term in connection with the Fort Hood plot. The others draw lesser terms. Glover is released in 2003, the last of the seven to get out.

December 12, 1997
A federal grand jury in Arkansas indicts three men on racketeering charges for plotting to overthrow the government and create a whites-only Aryan People's Republic, which they intend to grow through polygamy. Chevie Kehoe, Daniel Lee and Faron Lovelace are accused of crimes in six states, including murder, kidnapping, robbery and conspiracy. Kehoe and Lee will also face state charges of murdering an Arkansas family, including an 8-year-old girl, in 1996. Kehoe ultimately receives a life sentence on that charge, while Lee is sentenced to death. Lovelace is sentenced to death for the murder of a suspected informant, although in early 2005 he will be up for resentencing because of court rulings. Kehoe's brother, Cheyne, is convicted of attempted murder during a February 1997 Ohio shootout with police and sentenced to 24 years in prison, despite his key role in helping authorities find his fugitive brother in Utah in June 1997 after the shootout. Cheyne went to the authorities after Chevie began talking about murdering their parents and showing sexual interest in Cheyne's wife.

1998

January 29, 1998
An off-duty police officer is killed and a nurse terribly maimed when a nail-packed, remote-control bomb explodes outside a Birmingham, Ala., abortion facility, the New Woman All Women clinic. Letters to media outlets and officials claim responsibility in the name of the "Army of God," the same entity that took credit for the bombings of a clinic and a gay bar in the Atlanta area. The attack also will be linked to the fatal 1996 bombing of the Atlanta Olympics. Eric Robert Rudolph, a loner from North Carolina, is first identified as a suspect when witnesses spot his pickup truck fleeing the Birmingham bombing. But he is not caught until 2003. He ultimately pleads guilty to all four attacks in exchange for a life sentence.

February 23, 1998
Three men with links to a Ku Klux Klan group are arrested near East St. Louis, Ill., on weapons charges. The three, along with three other men arrested later, had formed a group called The New Order, patterned on a 1980s terror group called The Order (a.k.a. the Silent Brotherhood) that carried out assassinations and armored car heists. New Order members plotted to assassinate a federal judge and civil rights lawyer Morris Dees, blow up the Southern Poverty Law Center that Dees co-founded and other buildings, poison water supplies and rob banks. In the end, all six plead guilty or are convicted of weapons charges, drawing terms of up to seven years in federal prison. Wallace Weicherding, who came to a 1997 Dees speech with a concealed gun but turned back rather than pass through a metal detector, is freed in 2003. New Order leader Dennis McGiffen is released in July 2004, the last of the six to regain his freedom.

March 18, 1998
Three members of the North American Militia of Southwestern Michigan are arrested on firearms and other charges. Prosecutors say the men conspired to bomb federal buildings, a Kalamazoo television station and an interstate highway interchange, kill federal agents, assassinate politicians and attack aircraft at a National Guard base — attacks that were all to be funded by marijuana sales. The group's leader, Ken Carter, is a self-described member of the neo-Nazi Aryan Nations. Carter pleads guilty, testifies against his former comrades, and is sentenced to five years in prison. The others, Randy Graham and Bradford Metcalf, go to trial and are ultimately handed sentences of 40 and 55 years, respectively. Carter is released from prison in 2002.

May 29, 1998
A day after stealing a water truck, three men shoot and kill a Cortez, Colo., police officer and wound two other officers as they try to stop the suspects during a road chase. After the gun battle, the three — Alan Monty Pilon, Robert Mason and Jason McVean — disappear into the canyons of the high desert. Mason will be found a week later, dead of an apparently self-inflicted gunshot. The skeletal remains of Pilon are found in October 1999 and show that he, too, died of a gunshot to the head, another apparent suicide. McVean is not found, but most authorities assume he died in the desert. Many officials believe the three men intended to use the water truck in some kind of terrorist attack, but the nature of their suspected plans is never learned.

July 1, 1998
Three men are charged with conspiracy to use weapons of mass destruction after threatening President Clinton and other federal officials with biological weapons. Officials say the men planned to use a cactus thorn coated with a toxin like anthrax and fired by a modified butane lighter to carry out the murders. One man is acquitted of the charges, but Jack Abbot Grebe, Jr., and Johnnie Wise — a 72-year-old man who attended meetings of the separatist Republic of Texas group — eventually are sentenced to more than 24 years in prison.

July 30, 1998
South Carolina militia member Paul T. Chastain is charged with weapons, explosives and drug violations after allegedly trying to trade drugs for a machine gun and enough C-4 plastic explosive to demolish a five-room house. The next year, Chastain pleads guilty to an array of charges, including threatening to kill Attorney General Janet Reno and FBI Director Louis Freeh. He is sentenced to 15 years in federal prison.

October 23, 1998
Dr. Barnett Slepian is assassinated by a sniper as he converses with his wife and children in the kitchen of their Amherst, N.Y., home. Identified as a suspect shortly after the murder, James Charles Kopp flees to Mexico, driven and disguised by friend Jennifer Rock, and goes on to hide out in Ireland and France. Two fellow anti-abortion extremists, Loretta Marra and Dennis Malvasi, make plans to help Kopp secretly return. Kopp, also suspected in the earlier sniper woundings of four other physicians in Canada and upstate New York, is arrested in France as he picks up money wired by Marra and Malvasi. He eventually admits the shooting to a newspaper reporter — claiming that he only intended to wound Slepian — and is sentenced to 25 years in prison. Marra and Malvasi go to prison for almost three years after pleading guilty to federal charges related to harboring a fugitive.

1999

June 10, 1999
Officials arrest Alabama plumber Chris Scott Gilliam, a member of the neo-Nazi National Alliance, after he attempts to purchase 10 hand grenades from an undercover federal agent. Gilliam, who months earlier paraded in an extremist T-shirt in front of the Southern Poverty Law Center's offices in Montgomery, tells agents he planned to send mail bombs to targets in Washington, d.c. Agents searching his home find bomb-making manuals, white supremacist literature and an assault rifle. Gilliam pleads guilty to federal firearms charges and is sentenced to 10 years in prison. He is expected to be released in 2008.

July 1, 1999
A gay couple, Gary Matson and Winfield Mowder, are shot to death in bed at their home near Redding, Calif. Days later, after tracking purchases made on Mowder's stolen credit card, police arrest brothers Benjamin Matthew Williams and James Tyler Williams. At least one of the pair, Matthew Williams (both use their middle names), is an adherent of the anti-Semitic Christian Identity theology. Police soon learn that the brothers two weeks earlier carried out three synagogue arsons in Sacramento, along with the arson of an abortion clinic there. Both brothers, whose mother at one point refers in a conversation to her sons' victims as "two homos," eventually admit their guilt — in Matthew's case, in a newspaper interview. But Matthew, who at one point badly injures a guard in a surprise attack, commits suicide in jail in late 2002. Tyler, who pleads guilty to an array of charges in the case, is not expected to be eligible for parole for some 50 years.

July 2, 1999
Infuriated that neo-Nazi leader Matt Hale has just been denied his law license by Illinois officials, follower Benjamin Nathaniel Smith begins a three-day murder spree across Illinois and Indiana, shooting to death a black former college basketball coach and a Korean doctoral student and wounding nine other minorities. Smith kills himself as police close in during a car chase. Hale, leader of the World Church of the Creator, at first claims to barely know Smith. But it quickly emerges that Hale has recently given Smith his group's top award and, in fact, has spent some 16 hours on the phone with him in the two weeks before Smith's rampage. Conveniently, Hale receives a registered letter from Smith just days after his suicide, informing Hale that Smith is quitting the group because he now sees violence as the only answer.

August 10, 1999
Buford Furrow, a former member of the neo-Nazi Aryan Nations who has been living with the widow of slain terrorist leader Bob Mathews, strides into a Jewish community center near Los Angeles and fires more than 70 bullets, wounding three boys, a teenage girl and a woman. He then drives into the San Fernando Valley and kills Filipino-American mailman Joseph Ileto. The next day, Furrow turns himself in, saying he intended to send "a wake-up call to America to kill Jews." Furrow, who has a history of mental illness, eventually pleads guilty and is sentenced to two life terms without parole, plus 110 years in prison.

November 5, 1999
FBI agents arrest James Kenneth Gluck in Tampa, Fla., after he wrote a 10-page letter to judges in Jefferson County, Colo., threatening to "wage biological warfare" on a county justice center. While searching his home, police find the materials needed to make ricin, one of the deadliest poisons known. Gluck later threatens a judge, claiming that he could kill 10,000 people with the chemical. After serving time in federal prison, Gluck is released in early 2001.

December 5, 1999
Two California men, both members of the San Joaquin Militia, are charged with conspiracy in connection with a plot to blow up two 12-million-gallon propane tanks, a television tower and an electrical substation in hopes of provoking an insurrection. In 2001, the former militia leader, Donald Rudolph, pleads guilty to plotting to kill a federal judge and blow up the propane tanks, and testifies against his former comrades. Kevin Ray Patterson and Charles Dennis Kiles are ultimately convicted of several charges in connection with the conspiracy. They are expected to be released from federal prison in 2021 and 2018, respectively.

December 8, 1999
Donald Beauregard, head of a militia coalition known as the Southeastern States Alliance, is charged with conspiracy, providing materials for a terrorist act and gun violations in connection with a plot to bomb energy facilities and cause power outages in Florida and Georgia. After pleading guilty to several charges, Beauregard, who once claimed to have discovered a secret map detailing a planned un takeover mistakenly printed on a box of Trix cereal, is sentenced to five years in federal prison. He is released in 2004, a year after accomplice James Troy Diver is freed following a similar conviction.