NASA Administrator Charles Bolden will outline NASA’s human exploration path to Mars during a keynote address at the Humans to Mars Summit 2014 at 9 a.m. ET, Tuesday, April 22. The conference, sponsored by Explore Mars, will be held April 22-24 from 9 a.m. to 5 p.m. at the Lisner and Betts Auditoriums at George Washington University in Washington and will be carried live on NASA TV.