1988: Pan American Airways Flight 103 is bombed over Lockerbie, Scotland, on December 21, killing 259 passengers and crew, most of them Americans, and 11 people on the ground. Libyan suspects are accused of plotting the attack.
1992: The U.N. Security Council imposes sanctions on Libya in an effort to force the government to hand over two of its citizens wanted for the Lockerbie bombing.
1999: Libya hands over two suspects wanted for the attack on Pan Am Flight 103. The United Nations suspends sanctions against Libya but does not lift them.
2001: A Scottish court on neutral territory in the Netherlands convicts Abdel Baset al-Megrahi of the Lockerbie bombing and sentences him to life in prison. The other Libyan suspect is found not guilty.
2003: Libyan leader Moammar Gadhafi signs a deal to compensate families of the Lockerbie victims. The U.N. Security Council lifts sanctions against the country.
2006: The United States restores full diplomatic ties with Libya, paving the way for business agreements between the two countries. A U.S. ambassador is sent to Tripoli three years later.