Summary of events in the case of convicted Lockerbie bomber Abdel Baset al-Megrahi:
Nov. 14, 1991: U.S., Scottish authorities indict two Libyan intelligence officials — Abdel Baset al-Megrahi and Amin Khalifa Fhimah — in the bombing.
Dec. 11, 1996: Megrahi insists he is innocent and says he is willing to stand trial in a neutral country.
May 3, 2000: Trial on charges of conspiracy and murder opens at Camp Zeist in the Netherlands under Scottish law.
Jan. 31, 2001: Al-Megrahi found guilty and jailed for life. Fhimah is acquitted.
Jan. 23, 2002: Al-Megrahi appeal begins, but judges later uphold the conviction.
Aug. 15, 2003: Libya officially accepts responsibility for Lockerbie, agrees to pay restitution to relatives of victims.
Sept. 12, 2003: U.N. Security Council approves lifting U.N. sanctions against Libya.
March 2004: Former Prime Minister Tony Blair meets Libyan leader Muammar al-Qaddafi in a tent outside Tripoli and offers the "hand of friendship."
Feb. 24, 2005: Al-Megrahi is moved to Greenock prison in Scotland.
Oct. 21, 2008: Al-Megrahi is diagnosed with prostate cancer.
April 28, 2009: Al-Megrahi begins his second appeal against his conviction. An Edinburgh court hears his health has deteriorated.
April 29, 2009: Prisoner transfer agreement between Britain and Libya comes into force, allowing al-Megrahi to apply to serve the rest of his sentence in a Libyan jail — if he drops his second appeal.
Aug. 14, 2009: Al-Megrahi applies to drop his second appeal.
Aug. 20, 2009: Scottish justice secretary Kenny MacAskill to announce decision in al-Megrahi case.