It's the final countdown for Delta IV Heavy, United Launch Alliance's powerful rocket. And it's one you won't want to miss. When it launches. At 2:47 p.m. EDT Thursday, March 28, ULA called a scrub.
Delta IV Heavy made its debut during a December 2004 demonstration flight from Florida's Launch Complex 37. United Launch Alliance's last Delta IV Heavy triple-core rocket will launch on the NROL-70 ...
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