Neil Armstrong, the first man to walk on the moon, died Saturday of complications from heart surgery. Besides serving as a NASA astronaut, Armstrong was a project pilot on many pioneering high-speed aircraft, including the Mach 5 North American X-15. During his career, he piloted more than 200 different aircraft types, including jets, rockets, helicopters and gliders. Armstrong was also an aerospace engineer and university professor.
North American X-15
Legendary 1950s/1960s test pilot Scott Crossfield died alone in his Cessna T210 when it crashed in Georgia on April 19. He was 84.