OSWIECIM, Poland (AP) - Pope Benedict says, "In a place like this, words fail." The German-born pope made a solemn visit to the Nazi concentration camps of Auschwitz and Birkenau today. Up to a (m) million and a-half people, mostly Jews, died at the neighboring camps in Poland. Benedict said to speak in such a "a place of horror" is "particularly difficult and troubling" for a Christian and a pope from Germany. He walked along a row of plaques in the language of each nationality whose members died there. As he paused to pray, a light rain stopped and a brilliant rainbow suddenly appeared. Benedict was enrolled in the Hitler Youth as a teenager against his will, and was drafted into the German army in the last months of World War Two.