ASHDOD, Israel (AP) — The head of the U.S. agency overseeing American humanitarian assistance worldwide says Israel has agreed to use an improved system across the Gaza Strip to ensure humanitarian workers and aid can more safely move around. Samantha Power, administrator of the U.S. Agency for International Development, said that Israel has also taken new steps to increase the flow of aid through its port of Ashdod, just north of Gaza. Humanitarian workers have complained throughout the war that the system by which the Israeli military assures safe passage to aid has been a failure. Power said a system by which the U.N. and Israeli military communicate more closely will be extended across Gaza.