    Sentence 1: Do the U.S. flags on the  Imoon still have their original coloring  or were they faded due to the Sun?    Sentence 2:In 2009, NASA's robotic  Lunar Reconnaissance Orbiter, while  orbiting 50 kilometers (31 mi) above the  Moon, began photographing the  remnants of the Apollo program left on  the lunar surface, and photographed  each site where manned Apollo flights  landed.