Spectators Mario Vasquez, 40, of Redondo Beach and his son Mario Jr., 2, watch as space shuttle Endeavour, atop NASA's Shuttle Carrier Aircraft, prepares to land at Los Angeles International Airport Friday. Ringo H.W. Chiu/AP hide caption

itoggle caption Ringo H.W. Chiu/AP

Space shuttle Endeavour, attached to a 747, on the tarmac at the Kennedy Space Center in Florida. Bill Ingalls/NASA /UPI /Landov hide caption

itoggle caption Bill Ingalls/NASA /UPI /Landov

The Soyuz capsule lands with Commander Gennady Padalka of Russia, NASA Flight Engineer Joe Acaba and Russian Flight Engineer Sergei Revin aboard, near the town of Arkalyk, Kazakhstan. The capsule's final meter of descent is eased by braking engines. Carla Cioffi/NASA hide caption

itoggle caption Carla Cioffi/NASA

Rupert Spies, Senior Lecturer in Food and Beverage Management at Cornell, gives a hands-on workshop on bread making with the NASA team. Jason Koski/courtesy of Cornell University Photography hide caption

itoggle caption Jason Koski/courtesy of Cornell University Photography

This artist's illustration shows what NuSTAR should look like in orbit after its 30-foot-long mast deployed. JPL-Caltech/NASA hide caption

itoggle caption JPL-Caltech/NASA