Space shuttle Discovery, mounted atop a NASA 747 Shuttle Carrier Aircraft (SCA) makes its way past Ronald Reagan Washington National Airport, Tuesday, April 17, 2012, in Arlington, Va. Discovery, the first orbiter retired from NASA’s shuttle fleet, completed 39 missions, spent 365 days in space, orbited the Earth 5,830 times, and traveled 148,221,675 miles. NASA will transfer Discovery to the National Air and Space Museum to begin its new mission to commemorate past achievements in space and to educate and inspire future generations of explorers. Photo Credit: (NASA/Bill Ingalls)

Two NASA T-38 training jets are seen as they fly over Reagan National Airport, Thursday, April 5, 2012 in Arlington, VA. NASA, in cooperation with the Federal Aviation Administration, conducted training and photographic flights over the DC metropolitan area. T-38 aircraft have been used for astronaut training for more than 30 years as they allow pilots and mission specialists to think quickly in changing situations, mental experiences the astronauts say are critical to practicing for the rigors of spaceflight. Photo Credit: (NASA/Bill Ingalls)

An aircraft taking off from Ronald Reagan National Airport is seen passing in front of the Moon as it rises, Sunday, Dec. 3, 2017 in Washington. Today's full Moon is the first of three consecutive supermoons. The two will occur on Jan. 1 and Jan. 31, 2018. A supermoon occurs when the moon’s orbit is closest (perigee) to Earth at the same time it is full. Photo Credit: (NASA/Bill Ingalls)

Space shuttle Discovery, mounted atop a NASA 747 Shuttle Carrier Aircraft (SCA) flies near the U.S. Capitol, Tuesday, April 17, 2012, in Washington. Discovery, the first orbiter retired from NASA’s shuttle fleet, completed 39 missions, spent 365 days in space, orbited the Earth 5,830 times, and traveled 148,221,675 miles. NASA will transfer Discovery to the National Air and Space Museum to begin its new mission to commemorate past achievements in space and to educate and inspire future generations of explorers. Photo Credit: (NASA/Bill Ingalls)