Some accidents have deadly consequences. And sometimes it's the thing you didn't do — didn't say, didn't see — that leaves you with the most guilt.
For 25 years, retired Army Col. David Taylor has carried feelings of guilt over the death of one of the soldiers in a maneuver he was leading.
In 1991, during one of the final battles of the Gulf War, Army Spc. Andy Alaniz was killed by friendly fire in Iraq. A U.S. tank unit fired rounds at the group of vehicles Alaniz was in, mistaking them for the enemy. He was one of 35 Americans killed by friendly fire in the war.