Also took the Delta Heavy team a long time before they could successfully launch commercial cargos, they had their own problems to overcome. "The first launch

Also took the Delta Heavy team a long time before they could successfully launch commercial cargos, they had their own problems to overcome. "The first launch of the Delta IV Heavy in 2004 carried a boilerplate payload (dummy payload), and failed to reach intended orbit. Cavitation in the liquid oxygen propellant lines caused shutdown of both boosters 8 seconds early, and the core engine 9 seconds early; this resulted in a lower staging velocity for which the second stage was unable to compensate. The payload was left in a lower than intended orbit.[6] Its first operational payload was the DSP-23 satellite, successfully launched in 2007; "