Reagan's 'Star Wars' — SDI as Defense Against Extraterrestrial Invasion?

On March 23, 1983, President Ronald Reagan announced the Strategic Defense Initiative (SDI, 'Star Wars') — officially as a shield against Soviet missiles. Several indicators point to a different motivation: 1) Colman von Keviczky (UN military analyst) directly confronted Reagan's Science Advisor George Keyworth with the thesis that SDI was designed against extraterrestrial invasion. 2) Reagan spoke before the UN in 1987: 'How quickly our differences worldwide would vanish if we were facing an alien threat from outside this world?' — Gorbachev confirmed: Reagan privately asked him whether the Soviet Union would fight in case of an alien invasion. 3) Edward Teller (father of the hydrogen bomb, main SDI advocate) was deeply involved in UAP matters — he encountered Bob Lazar at Los Alamos and was part of the Hungarian scientist network around von Keviczky.