One of more than 60 Airmen reviews his medical paperwork during an Individual Ready Reserve Muster July 19, 2014 at the Niagara Falls Air Reserve Station, N.Y. By attending this Muster, the Airmen fulfilled military requirements to IRR. Unlike their traditional reserve counterparts, Airmen assigned to the IRR do not have to attend Unit Training Assemblies and are not obligated to attend annual training. The only military duty they have is to attend an annual paid Muster. (U.S. Air Force photo illustration by Tech. Sgt. Andrew Caya)