ARCHIVE THIS< br/>George Washington knew the cost of war — down to every penny. A 66-page expense account (right), penned by Washington during the Revolutionary War, is one of the compelling written records in American Originals: Part V at the National Archives in Washington, D.C. The exhibit, which runs through July 4 (how patriotic), showcases dozens of history-shaping documents, from Ronald Reagan’s hand-scrawled draft of his second inaugural address, to a letter from Leon Trotsky announcing the birth of the Soviet Union. (202) 501-5000; www.nara.gov