The flight of the unmanned Dragon freighter is supposed to be just a demonstration, but its success would mark a new era in spaceflight.
Nasa is keen to hand off routine space transportation to the private sector - for both cargo and crew.
The upcoming mission will be performed by the SpaceX company of California.
It has been given tentative clearance to launch Dragon on 30 April at 12:22 EDT (16:22 GMT) from Cape Canaveral Air Force Station, Florida.
Edited by Waspie_Dwarf, 22 May 2012 - 01:41 PM.