QUEEN ELIZABETH II TOURS NASA CENTER IN MARYLAND

Prince Philip greets NASA astronauts (L to R) Andrew Feustel, Megan McArthur, Michael Massimino, John Mace Grunsfeld, and Scott Altman, during a tour of the NASA's Goddard Space Flight Center in Greenbelt, Maryland on May 8, 2007. (UPI Photo/Manuel Balce Ceneta/POOL)