Bomb maker charged in Pan Am blast

The Justice Department on Monday unsealed charges accusing a Libyan bomb expert in the 1988 explosion of Pan Am Flight 103 over Lockerbie, Scotland, an attack that killed 259 people in the air and an additional 11 on the ground.

The charges were announced on the 32nd anniversary of the bombing and in the final news conference of Attorney General William Barr's tenure, underscoring his personal attachment to a case that unfolded during his first stint at the Justice Department.

He announced an earlier set of charges against two Libyan intelligence officials in his capacity as acting attorney general nearly 30 years ago, vowing that the investigation would continue. Though Barr had not appeared at a press conference in months, he led this one two days before his departure as something of a career bookend.

In presenting new charges, the Justice Department is revisiting a case that deepened the chasm between the United States and

Libya, laid bare the threat of international terrorism more than a decade before the Sept. 11 attacks and produced global investigations and punishing sanctions.

In 1992, the UN Security Council imposed arms sales and air travel sanctions against

Libya to prod Col. Moammar Gadhafi, the country's leader, into surrendering the two suspects.

But the Libyan government balked at surrendering the men to the U.S., skeptical they could receive a fair trial. Libya ultimately turned them over for prosecution before a panel of Scottish judges sitting in a Netherlands court. One man — former Libyan intelligence official Abdel Baset al-Megrahi — was convicted, and a second Libyan suspect was acquitted of all charges. Al-Megrahi was given a life sentence, but Scottish authorities released him on humanitarian grounds in 2009 when he was diagnosed with prostate cancer. He later died in Tripoli.