C is for Columbia - Space Shuttle

 It was 30 years ago this week that NASA ushered in a new era of spaceflight with the inaugural launch of space shuttle Columbia on April 12, 1981, setting the pace for three decades of monumental leaps in environmental and space science achievements.

Thirty years and 133 missions later, NASA is winding down the space shuttle program, with the three remaining shuttle orbiters and the prototype shuttle Enterprise slated to be enshrined at several museums around the country after the last two missions, STS-134 and STS-135, are flown.