NEW YORK (AP) -- Tens of thousands of anti-war protesters marched Saturday through Manhattan to demand an immediate withdrawal of U.S. troops from Iraq just hours after an American soldier died in a roadside explosion in Baghdad -- the 70th U.S. fighter killed in that country this month. "End this war, bring the troops home," read one of the many signs lifted by marchers on a sunny afternoon three years after the war in Iraq began. The mother of a Marine killed two years ago in Iraq held a picture of her son, born in 1984 and killed 20 years...