The Day the Earth Stood Still (2008)

In the original movie, a flying saucer orbits Earth, and lands in Washington, DC, on the Mall. Klaatu (Michael Rennie) steps out and is shot by a jumpy soldier. Gort (Lock Martin), an indestructible robot steps out of the spacecraft and proceeds to melt all the weapons, including tanks. Later, the Earth comes to realize that Gort has used very little of his power to make this happen.While lying on the ground, Klaatu orders Gort to stop, and is then taken by the military to a hospital from which he later escapes in order to learn more about this planet called Earth and its human inhabitants. He meets Helen Benson (Patricia Neal) and her son Billy (Billy Gray); takes Klaatu on a tour of Washington, DC; and finally stops in front of the Lincoln Memorial. Klaatu reads the words uttered by Lincoln many years ago and realizes that there might be hope for Earth.