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Delta IV - Wikipedia
Delta IV - United Launch Alliance
Delta (rocket family) - Wikipedia
The Delta IV Heavy, a rocket whose time has come and gone, will …
After a fiery finale, the Delta rocket family now belongs to history
Delta IV Heavy Launch: An Updated Finale for a Rocket That …
Delta IV Heavy launches on final mission - NASASpaceFlight.com
Delta IV Heavy rocket launches US spy satellite on penultimate …
ULA Delta IV Heavy Launches into History with Spectacular Final …
United Launch Alliance Successfully Launches the Penultimate Delta IV …