Federal, state and local agencies worked jointly to determine the contents and source of a mysterious container found on the beach near the mouth of the Poplar River in Poplar, Wisconsin, Aug. 17, 2016. Initial responders from the U.S. Coast Guard and Superior, Wisconsin, Fire Department determined the box was not emitting any radioactivity, and a follow-on investigation by the Wisconsin National Guard Civil Support Team and Wisconsin Department of Health Services ensured there was no radiation source from the surrounding area and that the object was not a hazard to the public. (U.S. Coast Guard photo)