Remembering the Virginia Tech shootings - During the early morning hours of April 16, 2007, Cho Seung-Hui went on a shooting rampage that left 32 of his fellow students dead. The tragedy shook the campus of Virginia Tech and raised questions as to whether school officials reacted quickly enough. CNN's Brian Todd recounts the first moments of the shootings.
1986: U.S. launches airstrike on Libya - On April 15, 1986, The United States launched an airstrike on Libya. Hours after the attack President Ronald Reagan made a televised address to the American people. In his address, he called the bombings an act of self-defense following the bombing of a West Berlin club that killed two American servicemen and injured several others.
Libyan President Col. Moammar Gadhafi's residential compound suffered a direct hit during the bombings. As a result, the Libyan leader's adopted daughter, Hanna Gadhafi, was killed.