[Assignment: 48-DPA-SOI_K_YPO_CC_1-15-07] Secretary Dirk Kempthorne hosting National Park Service (NPS)-Young Presidents' Organization (YPO) luncheon [at Main Interior, promoting the] Centennial Challenge, [part of Interior's initiative designed to prepare National Parks for another century of conservation and preservation in time for the NPS 100th anniversary in 2016] [48-DPA-SOI_K_YPO_CC_1-15-07_IOD_2258.JPG]