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Sierra Nevada on watch for critical cargo award
A prototype of Sierra Nevada's Dream Chaser space plane is nearing shipment to California's Mojave Desert to resume runway landing tests as officials wait for word from NASA whether the company will win a competition to ferry cargo to the International Space Station.
Photos: Atlas 5 rocket soars from West Coast
A collection of pad photos from the United Launch Alliance Atlas 5 rocket flight carrying the NROL-55 cargo for the National Reconnaissance Office.
Q&A with Mark Sirangelo, leader of Sierra Nevada Space Systems
Sierra Nevada Corp. has business activity across a spectrum of programs, from Orbcomm communications satellites to parts on the New Horizons mission to Pluto, but all eyes are now on the company's Dream Chaser spacecraft. Sierra Nevada's Mark Sirangelo met with reporters at the 2015 International Symposium for Personal and Commercial Spaceflight.
Photos: California’s predawn liftoff of Atlas 5 rocket
Making its second launch in just six days, a United Launch Alliance Atlas 5 rocket flight blasted off Thursday from Vandenberg Air Force Base in California.
Q&A with Frank Culbertson, president of Orbital ATK’s space systems group
Frank Culbertson, a former shuttle and station astronaut and now head of Orbital ATK's space systems group, spoke with Spaceflight Now's Stephen Clark on the sidelines of the 2015 International Symposium for Personal and Commercial Spaceflight.
Second Atlas 5 rocket launched in span of six days
Churning out the launches at a rapid pace, the Atlas 5 program sent another rocket soaring like clockwork Thursday for deployment of a national security satellite duo from California.
Video: Liftoff of Atlas 5 on NROL-55
A replay of the United Launch Alliance Atlas 5 rocket launching the classified NROL-55 payload for the National Reconnaissance Office from Vandenberg Air Force Base, California.
Photos: Gantry retracted from Atlas 5 rocket
The 8-million-pound mobile service tower is retracted from around the Atlas 5 rocket, revealing the 19-story-tall vehicle for liftoff from Vandenberg Air Force Base, California, on NROL-55.
Cygnus supply ship takes weather satellite’s slot in Atlas manifest
Orbital ATK plans to launch its next two commercial resupply missions to the International Space Station on Atlas 5 rockets, grabbing a launch slot in March after a next-generation U.S. weather satellite was delayed, industry officials said.
Live coverage: Atlas 5 countdown and launch journal
A United Launch Alliance Atlas 5 rocket blasted off from Vandenberg Air Force Base in California at 5:49 a.m. local time (8:49 a.m. EDT; 1249 GMT) Thursday on the classified National Reconnaissance Office NROL-55 mission.