The bombing of Pearl Harbor is a flashbulb memory for the oldest living Americans. The assassinations of John F. and Robert Kennedy and Martin Luther King Jr. and the first astronauts who walked on the moon are such moments for early baby boomers. These are some others.
USS Arizona under attack
Thick smoke, debris and clouds of flak fill the air over the shattered wreckage of the USS Arizona on Dec. 7, 1941, after the surprise Japanese attack on Pearl Harbor.
Challenger explosion: Jan. 28, 1986
In this Oct. 3, 1995, file photo, O.J. Simpson (center) clenches his fists after the jury said he was not guilty in the murders of his ex-wife Nicole Brown Simpson and her friend Ronald Goldman.
Death of Princess Diana: Aug. 31, 1997
Columbine school shooting: April 20, 1999
9/11: Sept. 11, 2001
Hurricane Katrina: Aug. 23-30, 2005
Omaha Von Maur shootings: Dec. 5, 2007
Osama bin Laden
Osama bin Laden death: May 2, 2011
Connecticut School Shooting
Sandy Hook Elementary School shooting: Dec. 14, 2012
Boston Marathon bombing
Boston Marathon bombing: April 15, 2013