A SR-71 Blackbird, an innovative long-range, high-speed and high-altitude spy plane used for over 30 years in the late 20th century. The Space Shuttle Discovery is in the background.

Space Holiday 2014: Photo 227 / 249

A SR-71 Blackbird, an innovative long-range, high-speed and high-altitude spy plane used for over 30 years in the late 20th century. The Space Shuttle Discovery is in the background.

A SR-71 Blackbird, an innovative long-range, high-speed and high-altitude spy plane used for over 30 years in the late 20th century. The Space Shuttle Discovery is in the background.