In the dark hours of June 13, 1942, a German U-boat surfaced off the coast of Long Island. Four saboteurs, under the leadership of one George Dasch, buried explosives beneath the sands of Amagansett as part of an elaborate plan to blow up Astoria’s Hell Gate Bridge, along with chemical plants being used in the American war effort. Naval intelligence Lt. Gen. Charles Radcliffe Haffenden had gotten word that four men had been spotted and sped out to Long Island’s East End. But his investigation didn’t follow standard military protocols. Haffenden stopped at Millie’s Inn by Napeague Beach for dinner...