Copyright © 2013 United Launch Alliance, LLC. Unpublished Work. All Rights Reserved. United Launch Alliance Commercial Crew Overview George Sowers 13 February 2013

21 October 2015 | 1 ULA Launch History (Through 2012) Sixty-Six Launches, 100% Mission Success

21 October 2015 | 2 TDRSS-K Jan 30, 2013 LDCM Feb 11, Atlas V Launches, 107 th Consecutive Atlas Success

21 October 2015 | 3 Commercial Crew  Commercial Crew Integrated Capability (CCiCap) Development and Launch of the Boeing CST-100 and Sierra Nevada Dream Chaser on Atlas V-4X2 –POP through May 2014  ULA Effort Includes –Human Spaceflight Certification –Emergency Detection System –Dual Engine Centaur –Common Avionics –LC-41 Modifications Crew Access Tower & Arm Elevator & Stairway Slide Wires  Initial Launch Capability –Uncrewed Mission in August 2016 –Crewed Mission in December 2016

21 October 2015 | 4 Human Spaceflight Certification  CCiCap Base Phase includes Integrated HSF Certification Effort –Atlas V compliance with NASA CTS and spacecraft requirements –Integrate Crew Safety baseline –Integrate Loss of Crew/Mission PRA –Integrate Hazard Analyses  Leverage NASA Atlas V Certification –Atlas V certified to NASA Risk Category 3 (highest certification level) –Atlas V nuclear safety launch approval  Human Spaceflight Certification is a combination of technical/operations requirements satisfaction, flight history NASA can leverage the body of evidence already available for Atlas V HSF Certification MRO/Atlas 401 Aug 2005 Pluto/Atlas 551 Jan 2006 Mars Science Lab Nov 2011

21 October 2015 | 5  Critical element for system level human rating  Prototype developed during CCDev1  Design matured in CCDev2  Design to be completed under CCiCAP –Fault tolerant computer –Existing redundant instrumentation –Measurements list chosen to provide complete fault coverage, but minimize false aborts Monitor Launch Vehicle Detect Safety Critical Anomalies Safe the Launch Vehicle Initiate the Abort Command Emergency Detection System (EDS)

21 October 2015 | 6 LC-41 Launch Site Accommodations Crew Access Tower (CAT) N Autocoupler Building (ACB) Rotating Crew Access Arm (CAA) Slide Wire System Generic SV Launch Exhaust Duct (LED) Pad Equipment Building (PEB)

21 October 2015 | 7 Summary  Atlas’s unparalleled record of mission success provides foundation for crewed missions –NASA Cat 3 and nuclear certification  On track to develop human spaceflight unique accommodations for 2016 ILC –Human Spaceflight Certification –Emergency Detection System –Launch Site Accommodations