The bad news: A missing Argentine submarine could be running low on air Wednesday. The good news: The weather is optimal for the multinational search, and if the sub is anywhere near its last known location, it likely hasn't sunk to its "crush depth."
The ongoing search for a missing Argentine navy submarine sheds light on the difficulty of finding a vessel that's designed not to be found -- especially one that might have lost its ability to communicate.
Argentina's navy on Monday possibly detected noises from the country's missing submarine. The sonar systems of two ships picked up noises sounding like tools being banged against the hull of a submarine, according to a senior US Navy official familiar with the Navy's assistance in the search for the vessel.
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