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Description: 
Former U.S. Sen. Mark Udall addresses "Security Conundrum" talk on NSA surveillance programs at CEMEX Auditorium on April 2, 2015.
Photo credit: 
Rod Searcey
Caption: 
Former U.S. Sen. Mark Udall addresses "Security Conundrum" talk on NSA surveillance programs at CEMEX Auditorium on April 2, 2015.