April 23 (UPI) -- Japan's Defense Minister Minoru Kihara on Tuesday said the United States will join search-and-rescue efforts for the seven missing Maritime Self-Defense Force members after two helicopters went down in the Pacific on Saturday. The defense minister told reporters that the U.S. Navy is set to dispatch a P-8 patrol aircraft and an MSDF oceanographic ship styled as Shonan -- based out of Yokosuka -- in the effort to locate potential debris on the ocean floor near the crash site