SpaceX delays launch of 'world's most powerful rocket'
Elon Musk-led space exploration startup SpaceX has delayed the maiden launch of its Falcon Heavy rocket, which it claims is the world's most powerful rocket. SpaceX President Gwynne Shotwell said that the rocket "should be ready for launch" within first few weeks of 2018. Earlier, Elon Musk had said that developing the rocket was "way more difficult" than anticipated.