One more story from "beyond the secret missions"
The book describes a lot of aircraft losses in detail, but here's a summary of the one that really caught my imagination:
"On 25th January 1966, Lockheed test pilots Bill Weaver and Jim Zwayer took off on a test flight. With the aircraft in a 30 degree bank at 80,000 feet at a speed of mach 3.2, the aircraft went out of control and broke up - the entire forebody became detached from the main body. The cockpit canopies were blown off and the two men were blown clear - the pilot's ejector seat was later found still in the cockpit section. Bill Weaver regained consciousness and found that his suit had inflated and was doing its job as his personal survival capsule. His parachute was activated by the barometric sensor and he landed safely. When his visor cleared he was reassured to see his RSO's parachute coming down nearby, but unfortunately Jim Zwayer didn't survive."