Well, it has been on the pad for over a year...
and six years in the making to make sure the strap on boosters perform as a unit.
Nevertheless, it will be a great accomplishment for Boeing* to plant 48,000 pounds in low orbit, including to ISS and about half as much weight to a trans lunar orbit.
Here's hoping for a successful launch of the biggest expandable rocket in the US!
*Pics of Delta IV (Boeing media)
