The area out at Area 51 that was part of the Operation Plumbbob test continues to be contaminated. It was not cleaned up until the '80s.
With stealth technology, the U.S. could spy on its Cold War adversaries without running the risk of getting caught.
Back in the 1950s, there was a top-secret program code-named SUNTAN being conducted at a top-secret facility called Skunk Works. Its objective? To develop a liquid-hydrogen-powered spy plane. Because liquid hydrogen is incredibly volatile, early experiments were conducted inside a bomb shelter with eight-foot-thick walls.
One of the few things the Air Force did admit to me existed out there presently without admitting that it was Area 51 is this drone called the 'Beast of Kandahar' which does not fire missiles, unlike the Predator and the Reaper, but just conducts surveillance.
In the winter of 1973, the American POWs held captive in Vietnam were released according to the terms of the Paris Peace Accords.
In the late 1960s, Ontario Airport was a throwback to a bygone era. Located 35 miles east of downtown Los Angeles, the airport served only two carriers, Western and Bonanza. Passengers could catch regional flights to San Francisco, Sacramento, Las Vegas, Palm Springs, Phoenix and Los Angeles, and that was about it.