Elon Musk's SpaceX Starship rocket explodes after launch-ProXAlpha

SpaceX's Starship - the most powerful rocket ever built - has exploded in mid air after launching in its second attempt

There were tense scenes as the launch at Boca Chica, Texas was

halted with two seconds to go, before getting the final go-ahead

minutes later.

SpaceX staff clapped and cheered as the rocket slowly blasted off in a giant plume of smoke