The first U.S. astronauts who will fly on spacecraft to and from the International Space Station.

The first U.S. astronauts who will fly on American-made, commercial spacecraft to and from the International Space Station, pose for a portrait in front of the Boeing CST-100 Starliner and SpaceX Dragon Commercial Crew vehicle mock ups at NASA's Johnson Space Center in Houston, Texas. The astronauts are, from left to right: Suni Williams, Josh Cassada, Eric Boe, Nicole Aunapu Mann, Chris Ferguson, Doug Hurley, Bob Behnken, Mike Hopkins and Victor Glover.