1921-1941 By azazush Period: 1920 to 1929 Roaring '20s May 20, 1927 Charles Lindbergh Flight across the Atlantic 1928 Amelia Earhart Transatlantic Flight Period: 1929 to 1939 Great Depression Period: 1930 to 1936 Dustbowl 1931 Hoover Dam Construction Starts May 1, 1931 Empire State Building Opens 1932 Franklin D Roosevelt Gets Elected President Sep 10, 1935 Huey P. Long Assassinated Dec 12, 1937 USS Panay Incident Dec 7, 1941 Pearl Harbor Dec 8, 1941 FDR Infamy Speech