Crowds of people gather in Bellahouston Park to observe Pope Benedict XVI perform a mass, in Glasgow,...
Crowds of people gather in Bellahouston Park to observe Pope Benedict XVI perform a mass, in Glasgow, Scotland September 16, 2010. Pope Benedict started a trip to Britain on Thursday urging the country to protect its Christian roots and tradition of tolerance in the face of threats from aggressive secularism and atheist extremism. REUTERS/Phil Noble (BRITAIN - Tags: POLITICS SOCIETY PROFILE RELIGION)