The Air Force's missile warning satellite, SBIRS GEO-3, lifted off aboard a ULA Atlas 5 rocket Jan. 20, after a 24-hour delay. Credit: ULA
SBIRS GEO Flight 3, the next satellite scheduled to join the U.S. Air Force’s Space Based Infrared System (SBIRS), in final assembly and test at Lockheed Martin in Sunnyvale, California. Credit: Lockheed Martin
The Air Force's missile warning satellite, SBIRS GEO-3, lifted off aboard a ULA Atlas 5 rocket Jan. 20, after a 24-hour delay. Credit: ULA
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
An Atlas 5 rocket carrying the MUOS-5 satellite lifts off from Cape Canaveral Air Force Station in Florida June 24, 2016. Credit: ULA/Ben Cooper.
SBIRS GEO Flight 3, the next satellite scheduled to join the U.S. Air Force’s Space Based Infrared System (SBIRS), in final assembly and test at Lockheed Martin in Sunnyvale, California. Credit: Lockheed Martin
SBIRS GEO Flight 3, the next satellite scheduled to join the U.S. Air Force’s Space Based Infrared System (SBIRS), in final assembly and test at Lockheed Martin in Sunnyvale, California. Credit: Lockheed Martin
The third SBIRS satellite, the next satellite scheduled to join the U.S. Air Force’s Space Based Infrared System (SBIRS), pictured above in final assembly and test at Lockheed Martin in Sunnyvale, California. Credit: Lockheed Martin.
The third SBIRS satellite, the next satellite scheduled to join the U.S. Air Force’s Space Based Infrared System (SBIRS), pictured above in final assembly and test at Lockheed Martin in Sunnyvale, California. Credit: Lockheed Martin.
The third SBIRS satellite, the next satellite scheduled to join the U.S. Air Force’s Space Based Infrared System (SBIRS), pictured above in final assembly and test at Lockheed Martin in Sunnyvale, California. Credit: Lockheed Martin.
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
The U.S. Air Force's  upcoming fifth and sixth satellites in its missile warning constellation will have a new satellite bus. CREDIT: Lockheed Martin.
Artist's concept of SBIRS satellite. Credit: U.S. Air Force
Frank Kendall, the U.S. undersecretary of defense for acquisitions, technology and logistics, addressing the Washington Space Business Roundtable Feb. 23, 2016. Credit: SpaceNews/Mike Moser
CHIRP
Constellation of Defense Support Program satellites; geosynchronous-orbiting SBIRS satellites; and SBIRS sensors hosted aboard classified satellites in highly elliptical orbit. Credit: Lockheed Martin artist's concept

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