SpaceX is expected to try once again this afternoon to test fire the engines on what it calls the world's most powerful rocket.
The static-fire test of the Falcon Heavy was originally scheduled for last week at Kennedy Space Center but has been postponed several times.
The company says the Falcon Heavy boasts five-million pounds of thrust and is capable of carrying more than 140-thousand pounds of cargo. SpaceX has been aiming for a demonstration launch sometime around the end of this month.