1927 — Aviator Charles A. Lindbergh flies across the Atlantic from New York to France, a 3,600-mile, 33.5-hour solo flight in the Spirit of St. Louis.

Elsewhere that year:

• Interstate Chiropractic Association is founded by African American doctors of chiropractic.
• The first public demonstration of television is given when a speech by Commerce Secretary Hoover, given in Ishington, is shown simultaneously to a group of investors in New York
• President Hindenburg of Germany rejects Germany’s responsibility for World War I.
• Trotsky and his followers are expelled from the Communist Party and exiled to the provinces. Stalin gains control.
• The Senate refuses to seat Senator-elect William S. Vare on the grounds of excessive campaign expenditures.
• The Holland Tunnel, designed by Clifford M. Holland, opens to vehicular traffic. More than 1.5 miles long, the tunnel travels under the Hudson River and connects New York with New Jersey.
• Georges Lemaîtr, a Belgian cosmologist, proposes the big bang theory to explain the origin of the Universe.
• Pavlov publishes Conditioned Reflexes, based on his experiments in which dogs, fad at the sound of a bell, salivated at the sound of the bell alone.