81st MDG, Mississippi National Guard exercise hurricane response Published March 3, 2020 By Airman 1st Class Kimberly L. Mueller 81st TRW/PA KEESLER AIR FORCE BASE, Miss. -- KEESLER AIR FORCE BASE, Miss. -- The 81st Medical Group here and the Mississippi Army National Guard worked together Feb. 27, 2020, for exercise PATRIOT South, which involved transporting patients in response to a simulated hurricane.