At the last minute, a problem with the Delta 4 Heavy rocket forced NASA to postpone the 4.5-hour test flight of the Orion spacecraft until Friday.
At 7:05 am EST, the takeoff was delayed by an hour due to the gusting wind at Cape Canaveral. The weather improved, but then arose with two of the three rocket drains of liquid hydrogen.
The United Launch Alliance, which built and launches the Delta 4 Heavy, failed to launch the rocket until 9:44 am EST, until it received a go-ahead for the tests from NASA.
“Despite the heroic attempts of the teams and mission managers, we didn’t have enough time to eliminate the last of the problems,” said NASA mission commentator Michael Curie.