OTD…Sept. 20 and Endeavour retirement

#OTD in 2000…Atlantis launched on a mission to make the International Space Station a home in orbit

The tugboat and barge transporting the last space shuttle external tank to its display venue in California have reached the inlet to the Panama Canal, now just days away from sailing into the Pacific.

#OTD in 1984…Challenger launched the Earth Radiation Budget Satellite