File:Delta IV Medium 4.2+ (with GOES-N) on launch pad.jpg - Wikipedia

Manual:Technical Manual - Mudlet

Delta IV Heavy NROL-91

Delta IV Parker Solar Probe

File:Delta IV Heavy rocket on launch pad.jpg - Wikipedia

File:Delta IV Medium+ (4,2) NROL-22 launch 1.jpg - Wikipedia

Delta IV Heavy NROL-91

File:Liftoff for a Delta IV Medium+ (4,2) after its launch tower.jpg - Wikipedia

Delta IV Heavy NROL-91

Delta IV

Manual:Technical Manual - Mudlet