NATO sources say the four are focusing on two issues. First, what steps drove NATO to war and was NATO’s leadership given all the facts before key decisions were made? Second, how did the war suddenly shift from a short, phased air campaign to an all-out, 78-day war, and how exactly were the bombing targets chosen? These questions go directly to the NATO SACEUR (Supreme Allied Commander in Europe) at the time, U.S. Army Gen. Wesley Clark, who retired last month.

The new U.S. commander of NATO, Gen. Joseph Ralston, is quietly encouraging these inquiries from the European allies, say NATO sources. His top aide, Chief of Staff Gen. Dieter Stockmann, believes there is plenty more to the tale of Kosovo. “We haven’t told the truth,” he told one source involved in the investigations. “It’s time to tell the truth.”