The ominous “Doomsday” plane has been spotted flying over California — for the second time in two months. The huge Boeing E-6B Mercury, which is the president’s emergency operations hub if nuclear war ...

Add Yahoo as a preferred source to see more of our stories on Google. NASA.gov If you spot a low-flying plane banking back and forth over the Houston area in the coming days, don't be alarmed -- it's ...

This photo provided by Lockheed Martin shows the X-59 jet plane, which was built by NASA and Lockheed Martin and can move faster than the speed of sound, on Jan. 1, 2025, in Palmdale, Calif. (Garry ...