The American tanker R.P. Resor sinks after it was torpedoed, on Feb 26, 1942, five miles off Sea Girt, Delaware. Of the crew of 50, only 2 survived. It showed how menacingly close U-boats came to the country's East Coast in early 1942. But the unprecedented speed of U.S. shipbuilding soon surpassed Allied losses and forced the Germans, with 696 of 830 subs sunk, to concede the seas.