On April 19, 1995, 168 people were killed and 680 injured in the bombing of the Alfred P. Murrah Federal Building in downtown Oklahoma City—leaving the country in mourning and in shock.

The blast damaged or destroyed 324 buildings, ruined 86 cars and shattered 258 windows in nearby buildings. It was the work of two domestic terrorists, Timothy McVeigh and Terry Nichols.

Today, 20 years later, we take a look back at the destruction and lives changed—and lost—by the terrorist attack.

The remains of automobiles with the destroyed Federal Building in the background two days after the bombing. (Photo: Staff Sergeant Preston Chasteen/U.S. military or Department of Defense)

The remains of automobiles with the destroyed federal building in the background two days after the bombing. (Photo: Staff Sgt. Preston Chasteen/Department of Defense)

Timothy James McVeigh (April 23, 1968 – June 11, 2001) was a United States Army veteran and security guard who was convicted of bombing the Alfred P. Murrah Building in Oklahoma City on April 19, 1995, the second anniversary of the Waco Siege, as revenge or to inspire revolt against what he considered a tyrannical federal government. (Photo: Bob Owen/San Antonio Express-News)

Timothy James McVeigh (April 23, 1968—June 11, 2001) was a U.S. Army veteran and security guard who was convicted of bombing the Alfred P. Murrah Building on April 19, 1995, the second anniversary of the Waco siege, as revenge or to inspire revolt against what he considered a tyrannical federal government. (Photo: Bob Owen/San Antonio Express-News)

Alfred P. Murrah Federal Building before destruction. (Photo: Licensed under Fair use via Wikipedia)

Alfred P. Murrah Federal Building before destruction. (Photo: Wikipedia)

Photo: John Whelihan/ZUMAPRESS.com

Photo: John Whelihan/ZUMAPRESS.com

 More details An aerial view, looking from the north, of the destruction. (Photo: US Army Corps of Engineers/Hronek, Sheri)

An aerial view, looking from the north, of the destruction. (Photo: Sheri Hronek/U.S. Army Corps of Engineers)

Oklahoma City Bombing 20th Anniversary

Photo: Newscom

A shrine to the dead at the site of the bombing of the Murrah Federal Building. (Photo: Newsroom)

A shrine to the dead at the site of the bombing of the Murrah Federal Building. (Photo: Newsroom)

Jimmie Boldien hugs the chair of his aunt, Laura Jane Garrison, at the Oklahoma City National Memorial on Monday, June 11, 2001.  (Photo: Vert/Newscom)

Jimmie Boldien hugs the chair of his aunt, Laura Jane Garrison, at the Oklahoma City National Memorial on June 11, 2001. (Photo: Vert/Newscom)

Participants and visitors to the Oklahoma City National Memorial gather around the reflecting pool on Wednesday, April 19, 2000 for a five-year memorial ceremony. (Photo: Horiz/Newscom)

Visitors to the Oklahoma City National Memorial gather around the reflecting pool on April 19, 2000, for a five-year memorial ceremony. (Photo: Horiz/Newscom)

Six years after the bombing, a family member mourns at the memorial. (Photo: Ed Lallo/ZUMAPRESS.com)

Six years after the bombing, a family member mourns at the memorial. (Photo: Ed Lallo/ZUMAPRESS.com/Newscom)