Wall Street, dollar fall on economic worry; oil up

By Sinead Carew NEW YORK (Reuters) - U.S. stocks fell for a second day on Wednesday and the dollar dipped after weak U.S. private sector employment and manufacturing data fed worries about the U.S. economy ahead of a highly anticipated jobs report Friday. Oil futures rallied as U.S. crude output fell for the first time in two months and the government said stockpiles grew less than some had feared. Also, Iran nuclear talks dragged on, making traders less nervous about a possible supply boost. Th