Via: (CNN) — The first wave of promised aid from the United States began arriving in Japan on Saturday in the wake of the devastating 8.9-magnitude earthquake and resulting tsunami. More aid — in the form of equipment, staffers and search-and-rescue teams — was expected to arrive Sunday. In Shiroishi, a town near the area hardest hit by the quake, two SH-60 helicopters from U.S. Naval Air Facility Atsugi delivered 1,500 pounds of rice and bread donated by people in Ebina, southeast of Tokyo, the U.S. 7th Fleet, said in a statement Saturday. The fleet is headquartered in Yokosuka, just…