DescripciónAEC-68-8422 JACKASS FLATS, NEVADA. . . Below the Phoebus 2A nuclear rocket reactor being tested, radiologists prepare to x-ray joints in tubing to determine the quality of welds. The Phoebus 2A is being tested under Project Rover, a joint – sponsored program of the Atomic Energy Commission – National Aeronautics and Space Administration. Credit: Bill Jack Rodgers, Los Alamos Scientific Laboratory