Memorial ceremonies took place Saturday in Washington, London and Scotland on the 25th anniversary of the deadliest act of terrorist committed in the UK and the biggest loss of American lives before 9/11. On Dec. 21, 1988, a Boeing 747 on a flight from London to New York exploded over Scotland, killing all 243 passengers, 16 crew and 11 people in the homes in the town of Lockerbie. Former FBI director Robert Mueller said Friday that the probe for the perpetrators ahd continued for 25 years. The agency was never satisfied that the truth ended with the conviction of Libyan intelligence official Abdel Baset al-Megrahi, who was later released and died. Intelligence sources in London now believe that Qaddafi’s intelligence agency was not responsible for the attack, but Ahmed Jibril’s Palestinian Popular Liberation Front-General Command’s terrorist organization.