More Notable Events on August 7: 1990 Desert Shield begins - U.S. deploys troops to Saudi Arabia 1987 5 Central American presidents sign peace accord in Guatemala 1976 U.S. Viking 2 goes into Martian orbit after 11-month flight from Earth 1959 Explorer 6 transmits 1st TV photo of Earth from space 1940 Churchill recognizes De Gaulle government in exile