Sierra Space had been looking to join SpaceX and Northrop Grumman as one of three commercial resupply partners for NASA aiming to fly its Dream Chaser spacecraft to the International Space Station.

U.S. Sen. Ted Cruz, R-Texas, and a bipartisan group of senators with the Senate Committee on Commerce, Science and Transportation are warning that the United States could fall behind China in the ...

NASA has banned Chinese citizens with U.S. visas from participating in agency programs — a dramatic escalation in the space race between China and the United States. It occurs as China gears up to ...