(Reuters) – Here is a timeline of main events since the 1988 bombing of Pan Am flight 103 over Lockerbie, Scotland, which was back in the news this week with the capture of a Libyan intelligence operative suspected of making the bomb that killed 270 people: * On Dec. 21, 1988, the flight to New York blows up over Scotland minutes after takeoff from London. The bombing kills all 259 people aboard the Boeing 747 jumbo jet and 11 residents of the town of Lockerbie. * On Jan. 31, 2001, a three-judge Scottish court at a former U.S. base in the Netherlands finds Libyan intelligence agent Abdel Baset…