Atlas 5 Cygnus launch
A SpaceX Falcon 9 rocket - carrying the NROL-76 payload for the NRO - sits on the launch pad April 29 at Launch Complex 39A. The rocket will have to wait at least 24 hours for liftoff after SpaceX scrubbed the launch planned for April 30 due to an issue with a first-stage sensor. Credit: SpaceX
Caption: The international space station is seen from Space Shuttle Discovery as the two spacecraft begin their relative separation in 2008.

Credit: NASA photo
NASA astronaut Peggy Whitson is seen during a Jan. 6, 2017, spacewalk during Expedition 50 aboard the International Space Station. Credit: NASA
International Space Station. Credit: NASA
Dragon after splashdown
With near unanimity, the summit agreed to the following: “The long term goal of the human spaceflight and exploration program of the United States is to expand permanent human presence beyond low-Earth orbit and to do so in a way that will enable human settlement and a thriving space economy. This will be best achieved through public-private partnerships and international collaboration.”
Credit: NASA/Michael Fincke
Credit: NASA