WASHINGTON, Sept. 3 -- Rep. Zach Nunn, R-Iowa, issued the following news release: DES MOINES U.S. Representative Zach Nunn (IA-03) today announced mobile office hours across the Iowa Third Congressional District to assist constituents who may not be able to travel to one of the congressional offices located in Creston, Des Moines, and Ottumwa. At these mobile office hours, Iowans will be able to get help from their Congressional office with Social Security, Medicare, passports, visas, veterans' more PR