"The Star-Spangled Banner" is one of America's grandest symbols. Yet historians fear that the origin of the song first penned as a poem by Francis Scott Key is easily forgotten or, worse, unknown -- even in Washington DC. Key penned the poem in honor of U.S. efforts in the War of 1812, the British-American war that brought the country new confidence and patriotism. So historians have teamed up with politicians to commemorate the war, parts of which were fought up and down the Chesapeake Bay. Congress is considering legislation that would designate as a national historic trail a 290-mile path winding through Maryland, Virginia and the District to link the war's battle sites.