170607-O-N0101-001 HOUSTON (June 7, 2017) Vice President Mike Pence poses for a group photograph with NASA's 12 astronaut candidates at NASA's Johnson Space Center in Houston, Texas. NASA astronaut candidates, standing from left, Robb Kulin, Jonathan Kim, Robert Hines, Warren Hoburg, Matthew Dominick, Kayla Barron, Jessica Watkins, from left kneeling, Francisco Rubio, Loral O'Hara, Jasmin Moghbeli, Zena Cardman, and Raja Chari. After completing two years of training, the candidates could be assigned to missions performing research on the International Space Station, launching from American soil on spacecraft built by commercial companies, and launching on deep space missions on NASA's new Orion spacecraft and Space Launch System rocket. (U.S. Navy photo courtesy of NASA by Bill Ingalls/Released)