The Challenge Of Integrating Muslims Into Europe By NPR Staff Published July 28, 2011 at 10:00 AM MDT Twitter LinkedIn Email Listen • 6:07 KAREN BLEIER / AFP/Getty ImagesUS Secretary of State Hillary Clinton's signature is viewed in a book of condolence at the Norwegian Embassy on July 28, 2011 in Washington, DC. Clinton made the visit to give condolence to the people of Norway for their loss in the July 22, 2011 twin attacks in Oslo and on the island of Utoeya. Copyright 2011 NPR