An unmanned SpaceX Falcon 9 rocket traveling at 2,900 mph, about 27 miles above the earth disintegrated 2 minutes and 19 seconds into its flight from Cape Canaveral to the International Space Station. It was a severe blow to NASA, still reeling from two previous failed Space Station resupply missions. The SpaceX failure is a reprieve for Russia’s Soyuz TMA-17M spacecraft that will remain the prime Space Station servicer, despite recently renewed US sanctions against Russia. The SpaceX launch, its seventh robotic cargo mission to the International Space Station, was running at what NASA called “on course, on track” before...