On August 17, 1988, Pan Am Flight 103 exploded over Lockerbie, Scotland, killing all 259 people on board and 11 people on the ground. The bomb was detonated by terrorists linked to Libya, and it remains one of the deadliest terrorist attacks involving a commercial airliner. The bombing led to international efforts to combat terrorism and improve airline security. In 2001, a Libyan man, Abdelbaset al-Megrahi, was convicted for his role in the bombing. The event had lasting effects on international counterterrorism policy.