39 years ago today we got our first look at Space Shuttle Enterprise. The List's Bradley Hasemeyer has 3 out of this WORLD reasons why NASA's first spaceship became a national icon... now on The List!

The Space Shuttle Enterprise (NASA Orbiter Vehicle Designation: OV-101) was the first Space Shuttle. It was built for NASA as part of the Space Shuttle program to perform test flights in the atmosphere, aided by a modified Boeing 747.[1] It was constructed without engines or a functional heat shield, and was therefore not capable of spaceflight. It was unveiled on September 17, 1976.