FILE - A police officer walks by the nose of Pan Am flight 103 in a field near the town of Lockerbie, Scotland where it lay after a bomb aboard exploded, killing a total of 270 people, in this December 21, 1988 file photo.  The son of the former Libyan intelligence officer convicted of the bombing says his father has died. Abdel Baset al-Megrahi  was released in 2009 from his Scottish prison on humanitarian grounds.  Al-Megrahi suffered from prostate cancer. His death was announced on Sunday  May 20 2012 by his son, Khaled. (AP Photo/Martin Cleaver, File)
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