Federal prosecutors are expected to unseal new charges against a bomb-maker linked to the 1988 attack on Pan Am Flight 103 over Lockerbie, Scotland, according to a report. Abu Agila Mohammad Masud, a top bomb-maker for the late Libyan dictator Moammar Khadafy, is accused of constructing the explosive that downed the airliner and killed 270 people on board, the Wall Street Journal said. Masud is being held by Libyan authorities.