Minnesota Congressman Keith Ellison held a public briefing on Capitol Hill to hear from a group of American imams on their recent trip to former Nazi concentration camps to help combat anti-Semitism and Holocaust denial. The group visited Dachau and Auschwitz camps in Germany. "I had gone to Auschwitz as a college exchange student and it had a transformative effect on me," Ellison said after the briefing Wednesday. The Democrat said that was one of the main reasons he got involved with the group.