U.S., SpaceX focus on second stage engine to wrap up certification
Monday, March 23, 2015 - 22:00
in Earth & Climate
WASHINGTON (Reuters) - The U.S. Air Force said on Monday it was on track to certify privately held SpaceX to launch U.S. military and spy satellites by June, with the final efforts focused on qualifying the second stage engine and structure of its Falcon 9 rocket.