Chemical and Biological Recon Exercise U.S. Marines of the 31st Marine Expeditionary Unit’s enhanced chemical, biological, radiological and nuclear team, look for a container holding a mock chemical/biological agent between the stowage of the ship's hangar bay, during a chemical/biological agent reconnaissance exercise on board the USS Essex, Nov. 14, 2006. The team conducted a three-day shipboard ECBRN training exercise focusing on the proper response measures and techniques for handling ECBRN-related scenarios for visit, board search and seizure missions on ships and other structures.   U.S. Marine Corps photo by Cpl. Kamran Sadaghiani Back To HomePage More Photo Essays Next About DefenseLink DoD Inspector General Freedom of Information Privacy & Security External Link Disclaimer Web Policy Contact Us USA.gov