SHEBOYGAN, Wis., March 20 /PRNewswire-USNewswire/ -- The National ResponseTeam from the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) alongwith ATF special agents from several states have entered the investigation ofa large unfinished residential building fire that occurred March 19 at theLandmark Square senior living center at the request of the Sheboygan Fire andPolice Departments. ATF's National Response Team (NRT) has brought definitive expertise and an array of state-of-the-art equipment to the investigation of major fire and explosives incidents since 1978. Four regional components, organized geographically to cover the United States, comprise the NRT. The team can respond within 24 hours to assist state and local law enforcement or fire service personnel in onsite investigations.