Keywords: Warrant Officer Donald Sheffield, 19th Regiment signal unit, Texas State Guard.jpg en Warrant Officer Donald Sheffield 19th Regiment signal unit Texas State Guard talks with a ham radio member about the communication exercise conducted at California Crossing National Guard Armory in Dallas Feb 6-8 2015 The exercise was to test communications at great distances manage operations and provide support to the communities and officials involved during a natural disaster Texas State Guard photo by Capt Esperanza Meza/ Released 2015-02-07 https //www dvidshub net/image/1895320/texas-state-guard-signal-unit-prepares-emergency-response Capt Esperanza Meza other versions cc-zero State defense forces of the United States |