LONDON, ENGLAND - MAY 1: (NOTE TO EDITORS: This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder.) In this handout image provided by Kensington Palace, Prince William, Duke of Cambridge signs the Book of Condolence at the Embassy of Nepal in London following the earthquake that devastated the region last week, on May 1, 2015 in London, United Kingdom. (Photo by Kensington Palace via Getty Images)