JOINT BASE LANGLEY-EUSTIS, Va. (Sept. 14, 2020) Rick Vollman, the crisis action team chief assigned to Joint Task Force Civil Support (JTF-CS), examines a simulated plume model during Vibrant Response 20 Lite. JTF-CS and Defense Chemical Biological Radiological and Nuclear Response Force units, in coordination with U.S. Army North, are participating in the week-long exercise to sustain unit readiness. (U.S. Navy photo by Mass Communication Specialist 2nd Class Michael H. Lehman)