Storms halt SpaceX's first U.S. national security space mission

SpaceX said its Falcon 9 rocket and payload, a roughly $500 million GPS satellite built by Lockheed Martin Corp, were "in good health" and that it was now targeting a Saturday morning launch from Florida's Cape Canaveral.Patrick Burke, a meteorologist with the National Weather Service's Weather Prediction Center in College Park, Maryland,said the weather might not clear up until Saturday.A successful launch would be a significant victory for Musk, a billionaire and Tesla Inc chief executive, who