Weapons hunters still are looking for chemical weapons at scores of large ammunition storage sites throughout Iraq. Because of the size of the depots, searchers have examined only 10 of 130 sites so far, Kay said.

"These are sites that contain - the best estimate is between 600,000 and 650,000 tons of arms," he said. "That's about one-third of the entire ammunition stockpile of the much larger U.S. military."

The Iraqis stored chemical weapons, often unmarked, among conventional munitions, so "you really have to examine each one," Kay said. He said 26 sites are on a critical list to be examined quickly.