Wall St extends losses as oil slides further

Wall Street slipped on Tuesday, in tandem with a renewed slide in oil prices, as yet another rally failed to take off in what has been a turbulent year so far for markets. Saudi Oil Minister Ali Al-Naimi told global energy executives on Tuesday that the kingdom had not "declared war" on rival producers, and welcomed the rise of nimble U.S. shale oil firms who will help quickly meet growing global demand.