FILE - In this Aug. 20, 2009 file photo, Lockerbie bomber Abdel Baset al-Megrahi holds his prisoner release papers as he boards an aeroplane at Glasgow International Airport, Glasgow, Scotland, bound for Tripoli. Al-Megrahi was released on compassionate grounds from a Scottish prison in August 2009, and allowed to return home to Libya, where a year later he continues to be treated for prostate cancer, although the cancer expert Prof. Karol Sikora, who said al-Megrahi had only three months to live before his release from prison is quoted in news reports Sunday Aug. 15, 2010, as saying he should have been more cautious about the prisoner's chances of survival. (AP Photo/Danny Lawson, File)