目录 Edwin Booth Saves Robert Lincoln Lieutenant John F. Kennedy (1917-1963) London Bridge The Peace Bridge Little Orphan Annie Cy Young The Purple Heart President Nixon Resigns Superdome Missouri Becomes a State SOS Hawaiis Last Queen Alfred Hitchcock (1899-1980) Social Security Panama Canal North Americas Greatest Gold Rush Hurricanes Virginia Dare Groucho Marx (I 890-1977) Eagle Scout Lincoln-Douglas Debates Ray Bradbury (1920-) Fannie Farmer (1857-1915) The First Potato Chip Allan Pinkerton (1819-1884) The Fuller Brush Man FindingThe Cause of Yellow Fever United Parcel Service Finding The USS Monitor Astronaut Jack Swigert (1931-1982) First Motion-Picture Machine Answer Key
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