MOST of the roughly 2.5 tons of natural uranium ore concentrate (UOC) recently declared missing from a site in Libya have been found at that site, the U.N. nuclear watchdog told member states in a statement seen by Reuters. The International Atomic Energy Agency informed member states in a similar confidential statement on March 15 first reported by Reuters that 10 drums containing the UOC had gone missing from a Libyan site not under government control. While the amount of fissile material is less than that required for a nuclear bomb and would need to go through processes known as conversion and…