Ted Kaczynski, aka the "Unabomber," is serving eight life sentences for <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2012%2F05%2F24%2Fus%2Fmassachusetts-harvard-unabomber%2F" target="_blank">mail bombings that killed three people and wounded 23 others</a> between 1978 and 1995. He is one of the notorious criminals living in the Supermax prison in Florence, Colorado.
Ted Kaczynski, aka the "Unabomber," is serving eight life sentences for mail bombings that killed three people and wounded 23 others between 1978 and 1995. He is one of the notorious criminals living in the Supermax prison in Florence, Colorado.
Elaine Thompson/AP
Former FBI agent Robert Hanssen is serving a life sentence without the possibility of parole for his role in spying for the Soviet Union and Russia. Hanssen, a 25-year FBI veteran, was the bureau's liaison to the State Department Office of Foreign Missions and was <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2002%2FLAW%2F05%2F10%2Fhanssen.sentenced%2Findex.html%3F_s%3DPM%3ALAW" target="_blank">primarily responsible for keeping track of intelligence agents </a>assigned to work in the United States "under diplomatic auspices."
Former FBI agent Robert Hanssen is serving a life sentence without the possibility of parole for his role in spying for the Soviet Union and Russia. Hanssen, a 25-year FBI veteran, was the bureau's liaison to the State Department Office of Foreign Missions and was primarily responsible for keeping track of intelligence agents assigned to work in the United States "under diplomatic auspices."
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Terry Nichols is serving 161 consecutive life terms in Supermax without the possibility of parole. Nichols helped Timothy McVeigh make the <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2013%2F09%2F18%2Fus%2Foklahoma-city-bombing-fast-facts%2Findex.html" target="_blank">bomb that detonated </a>at the Alfred P. Murrah Federal Building in Oklahoma City, killing 168 people in 1995.
Terry Nichols is serving 161 consecutive life terms in Supermax without the possibility of parole. Nichols helped Timothy McVeigh make the bomb that detonated at the Alfred P. Murrah Federal Building in Oklahoma City, killing 168 people in 1995.
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Eric Robert Rudolph is serving <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2012%2F12%2F06%2Fus%2Feric-robert-rudolph---fast-facts%2F" target="_blank">four consecutive life sentences plus 120 years</a> for an attack on <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2013%2F09%2F18%2Fus%2Folympic-park-bombing-fast-facts%2Findex.html" target="_blank">Atlanta's Centennial Olympic Park</a> in 1996. Two people died and more than 100 others were injured in the bombing.
Eric Robert Rudolph is serving four consecutive life sentences plus 120 years for an attack on Atlanta's Centennial Olympic Park in 1996. Two people died and more than 100 others were injured in the bombing.
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Umar Farouk AbdulMutallab is serving life in prison for <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2012%2F02%2F16%2Fjustice%2Fmichigan-underwear-bomber-sentencing%2F" target="_blank">smuggling a bomb in his underwear</a> aboard a commercial airliner on Christmas Day in 2009.
Umar Farouk AbdulMutallab is serving life in prison for smuggling a bomb in his underwear aboard a commercial airliner on Christmas Day in 2009.
U.S. Marshals Service/CNN
Richard Reid, aka the "Shoe Bomber," is serving a life sentence for <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2003%2FLAW%2F01%2F30%2Fshoebomber.sentencing%2F" target="_blank">trying to blow up a passenger jet with explosives in his shoes</a> in December 2001.
Richard Reid, aka the "Shoe Bomber," is serving a life sentence for trying to blow up a passenger jet with explosives in his shoes in December 2001.
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Zacarias Moussaoui is serving a life sentence for his involvement in the <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2014%2F11%2F17%2Fworld%2Fzacarias-moussaoui-saudi-arabia%2F" target="_blank">September 11 hijackings. </a>
Zacarias Moussaoui is serving a life sentence for his involvement in the September 11 hijackings.
U.S. Marshals Service/CNN
Dr. Michael Swango is serving three consecutive life sentences in connection with the murders of three patients in Northport, New York.
Dr. Michael Swango is serving three consecutive life sentences in connection with the murders of three patients in Northport, New York.
John Roca/NY Daily News Archive/Getty Images
Ramzi Yousef is serving a sentence of life in prison plus 240 years. Yousef was the mastermind behind the 1993 World Trade Center bombing in New York City, which<a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2013%2F11%2F05%2Fus%2F1993-world-trade-center-bombing-fast-facts%2Findex.html" target="_blank"> killed six people and injured </a>more than 1,000.
Ramzi Yousef is serving a sentence of life in prison plus 240 years. Yousef was the mastermind behind the 1993 World Trade Center bombing in New York City, which killed six people and injured more than 1,000.
New York Times/AP