Security changes at Bolder Boulder announced

Santiago Renteria of Grand Junction, Colorado struggles up the final hill to Folsom Field during the Citizen's Race of  the 2012 Bolder Boulder, Monday May 28, 2012 Close to 50, 000 participants ran in the annual Memorial Day race in Boulder, Colo.  (AP Photo/ The Camera /Paul Aiken)
Santiago Renteria of Grand Junction, Colorado struggles up the final hill to Folsom Field during the Citizen's Race of the 2012 Bolder Boulder, Monday May 28, 2012 Close to 50, 000 participants ran in the annual Memorial Day race in Boulder, Colo. (AP Photo/ The Camera /Paul Aiken)
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