Attorney General Dick Thornburgh will make ground-breaking visits this week to Hungary and Bulgaria to lobby for democratic reforms and post-Cold War cooperation in law enforcement.

The weeklong trip also includes a three-day stay in Rome where Thornburgh said he will discuss with European law enforcement officials "continued cooperation in terrorism investigations, border security issues and technology exchanges."A Justice Department official, speaking on the condition of anonymity, said a likely topic of discussion at the Rome meetings will be the progress of the investigation into the bombing of Pan Am Flight 103.

Despite the largest criminal investigation in history, there have been no arrests nearly two years after the terrorist bombing of the jetliner over Lockerbie, Scotland, that killed 270 people.