Theodore Roosevelt, seen here in 1885, was haunted by the fact that his father didn't fight in the Civil War. Library of Congress Prints and Photographs Division/PBS hide caption

itoggle caption Library of Congress Prints and Photographs Division/PBS

The Star-Spangled Banner, played before every baseball game, has become so tied to the sport that an old joke asks, "What are the last two words of the national anthem?" and answers, "Play ball!" Michael Dwyer/AP hide caption

itoggle caption Michael Dwyer/AP

The Erebus and the Terror among icebergs, as illustrated in The Polar World by G. Hartwig in 1874. Sir John Franklin, British naval officer and arctic explorer, commanded the 1845 expedition of the ships to search for the Northwest Passage. All members of the expedition perished. G. Hartwig/Universal History Archive/Getty Images hide caption

itoggle caption G. Hartwig/Universal History Archive/Getty Images

Grace Srinivasan plays Noor Inayat Khan, an Indian-American Muslim woman who spied for the British during World War II, in a new docudrama about her life. Jonathan Mount/Unity Productions Foundation hide caption

itoggle caption Jonathan Mount/Unity Productions Foundation

Sergeant Mariya Oktyabrskaya is one of the women featured on Jason Porath's blog Rejected Princesses. Oktyabrskaya was the first female tanker to ever win the Hero of the Soviet Union award. Jason Porath hide caption

itoggle caption Jason Porath

Logbook for the Jeannette, a ship that became trapped in ice, dated Sept. 5, 1879. Courtesy National Archives and Records Administration hide caption

itoggle caption Courtesy National Archives and Records Administration