Queen Elizabeth II talks with students at a NASA Explorer School Workshop, at NASA's Goddard Spaceflight Center, Tuesday, May 8, 2007, in Greenbelt, Md. Queen Elizabeth II and her husband, Prince Philip, Duke of Edinburgh, visited the NASA Goddard Space Flight Center as one of the last stops on their six-day United States visit. Photo Credit: (NASA/Pat Izzo)

Queen Elizabeth II talks with NASA astronaut Piers Sellers at NASA's Goddard Spaceflight Center, Tuesday, May 8, 2007, in Greenbelt, Md. Queen Elizabeth II and her husband, Prince Philip, Duke of Edinburgh, visited the NASA Goddard Space Flight Center as one of the last stops on their six-day United States visit. Photo Credit: (NASA/Pat Izzo)

Queen Elizabeth II and Prince Philip, The Duke of Edinburgh look on as Goddard employees demonstrate “Science on a Sphere.” This system, developed by the National Oceanic and Atmospheric Administration (NOAA), uses computers and four video projectors to display animated images on the outside of a 6-foot diameter sphere. Photo Credit: (NASA/Pat Izzo)

Nichelle Nichols 2012 MLK Event