FILE - In this December 1988 file photo, the wreckage of Pan Am Flight 103 is examined after an explosion brought the plane down over Lockerbie, Scotland, less than an hour after the New York-bound flight took off from London's Heathrow International Airport. Families of some of the 270 people who died in the airliner bombing 25 years ago gathered for memorial services Saturday, Dec. 21, 2013, in the United States and Britain, honoring victims of the terror attack that killed dozens of American college students and created instant havoc in the Scottish town where wreckage of the plane rained down. (AP Photo/File)