Claim: Burbank, California is a location where secret and technologically advanced airplanes were produced during the cold war.
Evidence: It was the location of Lockheed 's Skunk Works , which produced some of the most secret and technologically advanced airplanes , including the U-2 spy planes that uncovered the Soviet Union missile components in Cuba in October 1962.
Historians do not fully agree on the dates , but a common timeframe is the period between 1947 , the year the Truman Doctrine -LRB- a U.S. foreign policy pledging to aid nations threatened by Soviet expansionism -RRB- was announced , and 1991 , the year the Soviet Union collapsed.