A GPS 3 satellite atop a SpaceX Falcon 9 rocket sits at Launch Complex 40 at Cape Canaveral Air Force Station, Florida. Credit: SpaceX
Falcon 9 GRACE-FO launch
Clockwise from left: SpaceX's Falcon Heavy, ULA's Vulcan Centaur, Northrop Grumman's OmegA and Blue Origin's New Glenn rockets are all in the running to compete for a block of launch contracts the U.S. Air Force intends to divide between two providers during phase 2 of the Launch Service Agreements (LSA) program. Credit: SpaceX / ULA / Northrop Grumman / Blue Origin
The silver ring depicted in the Spaceflight illustration above is an ESPA ring developed by Moog under a U.S. Air Force contract. The black ring is called Hub and was manufactured by Airbus Defence and Space. It is similar to the ESPA Grande payload adapter.
The ULA Atlas 5 rocket carrying the Air Force's SBIRS GEO-3 satellite sits on the pad ready for launch, but will have to wait at least another day after  the attempt was scrubbed. Credit: ULA
Launch of Atlas 5 SBIRS GEO-2 from Cape Canaveral AFS. Credit: United Launch Alliance
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Delta 2 NASA Vandenberg
ULA Vulcan
A Delta 4 Heavy rocket carrying a payload for the National Reconnaissance Office lifts off June 11 from Cape Canaveral Air Force Station. Credit: Josh Dinner/SpaceNews
Atlas 5 launch
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RD-180 engines. Credit: ULA
An Atlas V rocket carrying the MUOS-4 mission lifts off from Space Launch Complex 41. Credit: ULA
GPS 3 satellite. Credit: Lockheed Martin

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