US President Barack Obama, left, and his wife Michelle greet the crowd prior to his speech in front of the Castle in Prague, Czech Republic, Sunday, April 5, 2009. Obama will also attend a summit between the United States and the 27-member European Union in Prague on Sunday. Seen in background left is the St. Nicholas church, on right is the statue of of Tomas Garrigue Masaryk, the first President of former Czechoslovakia.  (AP Photo/Herbert Knosowski) Photo: Herbert Knosowski, AP