SpaceX CRS-7 Launch Explosion Falcon 9
The unmanned SpaceX Falcon 9 rocket exploded on its way to the international space station on Sunday morning just minutes after taking off from Cape Canaveral in Florida. The first time the Falcon 9 has failed in 19 launches.
Exactly what happened is still being investigated, but this is what Ellon Musk posted on twitter.
There was an overpressure event in the upper stage liquid oxygen tank. Data suggests counterintuitive cause.
— Elon Musk (@elonmusk) June 28, 2015