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In 1969, President Nixon made a historic phone call to astronauts standing on the surface of this celestial body.
Difficulty: EasyThe first president's personal valet and enslaved companion throughout the Revolutionary War was freed in his will.
Difficulty: MediumThis British negotiator at Ghent, whose family later produced a famous prime minister, led the British delegation that secured the status quo ante bellum.
Difficulty: HardThe second President served this many years as Vice President under George Washington before taking the nation's highest office himself.
Difficulty: EasyNixon's decision to take the dollar off this precious metal standard in 1971 ended the Bretton Woods monetary system.
Difficulty: MediumIn 1906, a California city's board ordered Japanese students into segregated classrooms, sparking a diplomatic crisis that Roosevelt resolved through personal intervention.
Difficulty: HardJefferson's face appears on this denomination of U.S. currency alongside the nickel.
Difficulty: EasyAndrew Jackson's 1829 inauguration became chaotic when this building was overrun by celebrating crowds.
Difficulty: Medium