High school sophomores Rachel Ruth, left, Rhianna Cheek and Mandi Annibel console each other during a vigil service the day after the Columbine massacre in Littleton, Colorado in April 1999.
Whitney Wilson, 15, leans on her mother Debbie during a candlelight vigil on the first anniversary of the Columbine massacre in April 2000 in Littleton, Colorado.
Sharon McManus hugs her son Ed during a visit to a makeshift memorial in a park near Columbine High School in Littleton, Colorado in April 1999.
Execution witness Shari Sawyer, right wipes a tear as she leans on her husband Jay in Oklahoma City following the execution of Timothy McVeigh in June 2001. Jay Sawyer's mother was killed in the 1995 bombing of the Alfred P. Murrah Federal Building. The Sawyers were among nearly 300 people who witnessed the execution of McVeigh in Indiana on a closed-circuit television in Oklahoma City.
Visitors walk past the east 'Gate of Time' at the Oklahoma City National Memorial in June 2001. The following day convicted bomber Timothy McVeigh was executed for the 1995 bombing of the Alfred P. Murrah Federal building.
Visitors to the Oklahoma City National Memorial are reflected against one of the 'Gates of Time' as the sun sets in June 2001. The following day convicted bomber Timothy McVeigh was executed in Indiana for the 1995 bombing of the Alfred P. Murrah Federal Building.
The horrors and sadness of the Yugoslavian civil war is seen ont he faces of this couple in Zenica, Bosnia-Herzegovina in 1997. The family was staying with friends after losing their home in the war.
Joe Hart of the U.S. Forest Service inspects a burned out area in Glacier Natinal Park in Montana after wild fires had swept through in September 2001.
An inmate uses a mirror to see the hallway next to his cell in a maximum securing facility at Leavenworth Prison in Kansas in 1991.
Anti-WTO protestors tear down barricades during the World Trade Organization meeting in Cancun, Mexico in September 2003.
An anti-WTO protestor clashes with the Mexican Federal Police during the World Trade Organization meeting in Cancun, Mexico in September 2003.
Protestors clash with Mexican Federal Police during a World Trade Organization meeting in Cancun, Mexico in September 2003.
Volunteer medics carry wounded Korean farmer Kung Hae Lee after he stabbed himself in the chest and stomach in protest of the World Trade Organization outside a WTO meeting in Cancun, Mexico in September 2003. Kung Hae Lee died several hours later from the self-inflicted wounds.