Launch Complex Panorama Space Launch Complex 37 as seen from Launch Complex 34 at Cape Canaveral Air Force Station
Delta IV Heavy at Sunrise United Launch Alliance's Delta IV Heavy rocket, lit by xenon spotlights as the sun rises behind SLC-37B.
Space Launch Complex 37B Originally built to support Saturn Launches, SLC-37B is now used by ULA for the Delta IV Medium+ and Heavy rockets.
Mobile Service Tower Retracted The Delta IV Heavy is fully exposed now that its mobile service tower has been rolled back for launch.
Rocket Scale Employees appear tiny at the base of the 24+ story rocket. Photo credit: Dawn Haworth
Mobile Tower Rollback The Delta IV Heavy emerges from the mobile service tower, as the latter rolls back from the launchpad.
Mission Patches US Air Force, Delta IV and United Launch Alliance patches are painted onto the interstage fairing of the Delta IV Heavy.
Pad B Space Launch Complex 37 was originally home to two launchpads, A and B; after being reactivated by ULA in the early 2000s, only pad B was built to support Delta IV launches.
Delta IV Heavy (front) Photo credit: Dawn Haworth
Across the Pond
Liftoff of NROL-37
Liftoff of NROL-37 Photo credit: Dawn Haworth
Delta IV Heavy in Flight
Delta IV Heavy in Flight After liftoff, the center engine is throttled down to 55% thrust, resulting in a different exhaust pattern.
Closeup of RS-68A Engines Aerojet Rocketdyne's RS-68A engine powers the Delta IV off the launchpad.
Startled Birds flee the Delta IV Heavy launch. This photo won first place in the Aviation Week & Space Technology 2016 photo contest, space division.
Delta IV Heavy Liftoff
Delta IV Signature Fireball The RS-68A engines release a small amount of hydrogen into the air around the base of the rocket, which ignites into a fireball at launch time. Photo credit: Jared & Dawn Haworth
Delta IV Clears the Tower Photo credit: Jared & Dawn Haworth
Delta IV / NROL-37 Launch Photo credit: Jared & Dawn Haworth