If you go to the Smithsonian in Washington, DC, you can see a massive American flag: thirty feet tall and forty-two feet long. That's huge! But how did it get there? And where did it come from? The story of this giant flag begins in 1812 and stars a major on the eve of battle, a seamstress and her mighty helpers, and a poet named Francis Scott Key. This isn't just the story of one flag. It's the story of 'The Star Spangled-Banner,' a poem that became our national anthem, too.