https://www.yahoo.com/news/spacex-retry-launch-first-u-national-security-space-111315722–finance.html
Elon Musk's SpaceX scrapped Saturday's launch of a long-delayed navigation satellite for the U.S. military due to strong upper level winds.
The next launch attempt will be on Sunday at 8:51 a.m. EST/ 13:51 UTC, according to Space X officials.
The launch, SpaceX's fourth attempt in a week after technical and weather delays, would have been the rocket firm's first national security space mission for the United States. Musk's rocket company has spent years trying to break into the lucrative market for military space launches long-dominated by Lockheed and Boeing Co .
SpaceX sued the U.S. Air Force in 2014 in protest over the military's award of a multibillion-dollar, non-compete contract for 36 rocket launches to United Launch Alliance, a partnership of Boeing and Lockheed. It dropped the lawsuit in 2015 after the Air Force agreed to open up competition.
The next year, SpaceX won an $83 million Air Force contract to launch the GPS III satellite, which will have a lifespan of 15 years.