FILE - In this Nov 1, 2014 file photo, law enforcement officials take a closer look at the wreckage near the site where a Virgin Galactic space tourism rocket, SpaceShipTwo, exploded and crashed in ... more 
FILE - In this Nov 1, 2014 file photo, law enforcement officials take a closer look at the wreckage near the site where a Virgin Galactic space tourism rocket, SpaceShipTwo, exploded and crashed in Mojave, Calif. The explosion killed a pilot aboard and seriously injured another while scattering wreckage in Southern California's Mojave Desert, witnesses and officials said. The U.S. National Transportation Safety Board concluded Tuesday, July 28, 2015, that the developer of a commercial spacecraft that broke apart over the Mojave Desert last year failed to protect against the possibility of human error, specifically the co-pilot's premature unlocking of a braking system that triggered the in-flight breakup of the vehicle. (AP Photo/Ringo H.W. Chiu, File) less 
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Associated Press | Photo By Ringo H.W. Chiu, File
Tue, Jul 28, 2015 4:42 PM EDT