U.S. says forces closing in, Saddam defiant By Nadim Ladki BAGHDAD, March 24 (Reuters) - A defiant President Saddam Hussein said on Monday invaders sent to topple him were trapped in Iraq after five days of war, but the U.S. commander of the invasion said his forces were closing in fast on Baghdad. British Prime Minister Tony Blair said advance units were just 60 miles (90 km) south of the Iraqi capital and predicted that a critical battle of the war was fast approaching. U.S. General Tommy Franks described Iraqi resistance as "sporadic" and said his forces were intentionally skirting...