Firefighters assigned to stand by for rescue of other firefighters inside a structure; an implementation to support the Two-in, two-out rule; may have specialized training, experience and tools. While all of these versions of the name for a firefighter rescue crew either have been used or continue to be used in several areas, the National Incident Management System (NIMS) has determined that Rapid Intervention Crew, ("RIC") will be the national term. Current U.S. federally mandated training programs are in the process of standardizing this and other terms under DHS and FEMA. FAST operations became officially mandated after the Worchester, MA Cold Storage Fire, which claimed the lives of 6 firefighters, after they became disoriented in the smoke and subsequently ran out of air.