Falcon 9

On June 28, 2015, the Falcon 9 disintegrated beginning at 2 minutes and 19 seconds after launch, resulting in a total loss. SpaceX CEO Elon Musk stated it was due to an "overpressure event" in the upper stage's liquid oxygen tank, though no cause has been confirmed. The Falcon 9 was carrying the Dragon vehicle and cargo intended to resupply the International Space Station. This marked the first primary mission failure for Falcon 9, following 17 fully successful launches. Preliminary reports indicate a strut failed within the second stage liquid oxygen tank, releasing a relatively buoyant helium tank. The released helium tank apparently struck the top of the oxygen tank, ruptured, and caused the explosion. A 10m x 4m piece of the rocket was found between Bryher and Tresco, in the Isles of Scilly in November 2015, covered in barnacles, and was towed ashore.