Yesterday morning I was walking the dogs along the beach. All of a sudden two US Coast Guard helicopters started to hover around the area. One helicopter even lowered something from its body. It then dropped very low where it could not be seen. All of us on the beach assumed that they were rescuing a swimmer in trouble or retrieving the body of someone who had drowned. I later found that the helicopters were thee for a research project from the Department of Homeland Security and the Department of Energy. They were measuring natural background radiation. Why do they need this information? I suspect they need to know these things so that they could better detect a rogue nuclear device hidden by terrorists.