WASHINGTON, May 31 -- Sen. Roger Marshall, R-Kansas, issued the following news release: * * * Senator Marshall Visits Southern Border Alongside Kansas Law Enforcement Officials * Washington - U.S. Senator Roger Marshall, M.D. (R-Kansas) visited Sierra Vista, Arizona yesterday to tour the Joint Task Force-Southern Border Command offices, thank members of Kansas' own 1 st Infantry Division from Fort Riley, participate in tours along the southern border, receive briefings, and take an aerial to  more