Chris Chadwick (left) is president and chief executive officer of Boeing Defense, Space &; Security  and a member of Boeing's executive council. Craig R. Cooning (right) is president of Boeing Network and Space Systems. Credit: Boeing
AR-1 twin configuration
Stratolaunch Carrier
Final assembly of payload fairings at Ruag Space in Emmen, Switzerland. Credit: Ruag Space
Tory Bruno, the president and chief executive of United Launch Alliance, tweeted this infographic  July 29  depicting the Vulcan rocket's Atlas heritage. Credit: ULA.
ULA CEO Tory Bruno unveils the company's proposed Vulcan rocket during an April 13 press conference at the Space Symposium in Colorado Springs. Credit: Tom Kimmell for Space Foundation.
ULA CEO Tory Bruno
Stratolaunch Hangar
ULA CEO Tory Bruno unveils the company's proposed Vulcan rocket during an April 13 press conference at the Space Symposium in Colorado Springs. Credit: Tom Kimmell for Space Foundation.
ULA President and CEO unveils Vulcan,  the company's proposed new rocket, during an April 13 press conference at the 31st Space Symposium. Credit: Space Foundation