Cape Canaveral Air Force Station, Florida — A Boeing Delta IV integrated Common Booster Core/RS-68 main engine unit makes its way to the launch pad at Space Launch Complex 37, Cape Canaveral Air Force Station, Fla. The unit is the one that was used for the static hot fire test program conducted earlier this year at NASA’s Stennis Space Center. The Boeing Delta team is using the unit to conduct pathfinder exercises of the new launch complex that will begin operations next year with the first launch of the Delta IV.