Hamid Asan Hasan dropped his wallet, and as he stooped to pick it up he spotted the small round object. Curious, he picked that up too. It exploded and blew off part of his hand. The Lebanese army passed out leaflets Thursday to warn residents of south Lebanon to beware of just such weapons. It was too late for Hasan, who was injured Sunday, one day before the cease-fire took hold to end fighting between Israel and Hezbollah. "The place is full of unexploded ordnance, shells and mortars," said Chris Clark, program manager for the U.N. Mine Action Coordination center...