On this day in space! Sept. 7, 1995: NASA launches its 100th astronaut flight on space shuttle Endeavour's STS-69 mission

On Sept. 7, 1995, the space shuttle Endeavour launched on mission STS-69. This was the 100th successful crew spaceflight mission for NASA. Endeavour lifted off from NASA's historic Pad 39A launch site at the Kennedy Space Center in Florida. During the 11-day mission, five crewmembers did science experiments, deployed and retrieved a satellite called Spartan 201, and conducted a nearly seven-hour-long spacewalk to practice methods future astronauts would use to build the International Space Stati