. ♪ what so proudly we hailed at the twilight's -- ♪ >> these are students from fran sis scott key elementaryhe author of the anthem. >> he wrote the poem which later became a song 200 years ago this month. >> they need to cherish and celebrate their history and know what their past was and their history was. when they hear this song, they know that today they celebrated the 200 anniversary. >> key wrote the star spangled banner during the war of 1812, inspeier ish /* inspired when he saw the american flag still flying after the siege of baltimore. >> the anthem isn't always sung on key or even with the right lyrics. >> that's true. we compiled a few samples. take a listen. ♪ the rocket's red glare the bombs bursting in air ♪ ♪ the ramparts we watched was still streaming ♪ ♪ and the rockets red glare as bombs burst in the air ♪ >> wow. you sing at events sometimes but you have never forgotten the words, have you? >> thank goodness, never forgot the words. proud to say mostly on key. >>> world news tonight with david muir is next. i'm ama daetz. >> i'm dan ashley. for all of us here, thanks fo