Joy Bretthauer, Glory Program Executive, NASA Headquarters, talks about the launch of the GLORY mission during a news conference at NASA Headquarters, Thursday, Jan. 20, 2011, in Washington. NASA's newest Earth-observing research mission is scheduled for launch form Vandenburg Air Force Base in California on Feb. 23. The mission will improve our understanding of how the sun and tiny atmosppheric particles called aerosols affect Earth's climate. Photo Credit: (NASA/Paul E. Alers)