SpaceX has again delayed the first launch of its Dragon cargo ship to ISS. The launch is now scheduled for May 19, with a backup date of May 22. The company wants more time to check out its Falcon 9 rocket.
This will be the first flight by a private company's vehicle to ISS, and both SpaceX and NASA want to do everything possible to make it a success. If they succeed, the flight will open a new era of the Space Age.