OTD…Sept. 19 and Endeavour retirement

#OTD…Launch of Columbia in 1993 on the second flight of the German Spacelab

OTD in 1969…The launch of Apollo 11 for the first human landing on the moon

Navigating the 48-mile Panama Canal that slices through the isthmus, the final shipment of a space shuttle external fuel tank emerged into the Pacific for a three-week trek to California.