'Flaws' in key Lockerbie evidence

An investigation by BBC's Newsnight has cast doubts on the key piece of evidence which convicted the Lockerbie bomber, Abdelbaset Ali al-Megrahi. Tests aimed at reproducing the blast appear to undermine the case's central forensic link, based on a tiny fragment identified as part of a bomb timer. The tests suggest the fragment, which linked the attack to Megrahi, would not have survived the mid-air explosion. Two hundred and seventy people died in the 1988 attack on Pan Am flight 103. Megrahi was jailed for the attack in 2001, but he was controversially released from prison in Scotland by Scottish Justice Secretary Kenny MacAskill in August 2009 on compassionate grounds.