2.3 Timelines Online By Mairtimetraveler Period: Jul 28, 1914 to Nov 11, 1918 WWI Sep 11, 1921 NCSS is Founded Period: Oct 29, 1929 to Oct 29, 1932 Great Depression Period: Sep 1, 1939 to Sep 2, 1945 WWII Dec 7, 1941 Pearl Harbor http://www.pearlharboroahu.com/attack.htm Period: Jun 25, 1950 to Jul 27, 1953 Korean War Period: Dec 1, 1955 to Apr 9, 1968 Civil Rights Movement Oct 4, 1957 First Satellite Launched (Sputnik, Russia) Period: Sep 11, 1960 to Apr 30, 1973 Vietnam Apr 12, 1961 First Man in Space (Yuri Gagarin, Russia) Aug 25, 1969 First Man on Moon (Neil Armstrong, USA) Aug 9, 1974 Watergate Period: Jun 14, 2000 to Sep 11, 2013 N.C.L.B. mandate in schools Sep 11, 2001 World Trade Center Attacks On this date, terrorist used American commercial planes to crash into our buildings killing thousands of innocent people.