CAPE CANAVERAL, Fla. - Mary Hanna, crawler-transporter integration manager, discusses the crawler-transporter with astronaut candidates Nicole Mann, Anne McClain, Christina Hammock, Jessica Meir, Andrew Morgan, Josh Cassada, Tyler "Nick" Hague and Victor Glover in the Vehicle Assembly Building at NASA's Kennedy Space Center during a daylong set of briefings and tours of different facilities at NASA's primary launch center. The astronaut class of 2013 was selected by NASA after an extensive year-and-a-half search. The new group will help the agency push the boundaries of exploration and travel to new destinations in the solar system. To learn more about the astronaut class of 2013, visit: http://www.nasa.gov/astronauts/2013astroclass.html Photo credit: NASA/Kim Shiflett