"But Scotland's highest court has said no. Al-Megrahi, till this day, has maintained his innocence, and claims he was not involved in the Lockerbie bombing."
Al-Megrahi was convicted of blowing up a Pan Am jumbo jet as it flew from London to New York on December 18, 1988, killing all 259 people on board.
Eleven residents of the town of Lockerbie were killed by falling wreckage.
Al-Megrahi, 56, a former Libyan intelligence agent, was convicted in 2001 after a trial held in the Netherlands under Scottish law and sentenced to life in prison.
An initial appeal was rejected in 2002.
However, a Scottish criminal review body decided last year that al-Megrahi was entitled to another appeal on the grounds that he might have been the victim of a miscarriage of justice.