so beginning in 1959, scott crossfield, the north american research engineering test pilot makes the first flight in the x-15, this particular one, which is the number 1 x-15 i've seen where it can fly; how it can fly. and then by the mid-196os, you have a flight program that is influenced and encourage how the space program develops its flight. so there's a high-range at edwards air force base that these aircraft operate and flown over, and they're tracked, just like you're tracking a satellite or capful, you're tracking this aircraft. >>> by the mid-to-late '60s, x-15 flights are pushing that regime in terms of flying 67 miles high or 345,000 feet, and then flying the high-speed of mach 6 or 4,500 miles per hour. so the pilots of these vehicles are primarily nasa pilots or air force pilots. so these are missions that are pushing people to believe and encourage people, is this the way into space? is this what's going to be developed to make this transition. so you have to think that when this airplane first flies in 1959 is that its only -- i mean, charles lindbergh is alive, and th