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Days and some say, they may only have enough oxygen for two more days at the most? >> reporter: thats right, david. the argentine navy says in a worst case scenario, if the submarine has sunk, it only has a total of a weeks worth of oxygen. david? >> linzie janis in argentina. linzie, thank you. president trump putting north korea back on the list of state sponsors of terror tonight, calling it a, quote, murderous regime. and promising new sanctions and penalties. secretary of state rex tiller...