(A nurse of the Knights of Malta walks past Pope Benedict XVI,at the end of a mass to mark the 900th anniversary of the Order of the Knights of Malta, inside St. Peter's Basilica, at the Vatican, Saturday, Feb. 9, 2013. The Knights of Malta, one of the most peculiar organizations in the world, is marking its 900th birthday with a colorful procession through St. Peter's Square, a Mass in the basilica and an audience with Pope Benedict XVI. The Knights are at once a Catholic religious order, an aid group th)
