WASHINGTON (AFP) — The United States should step up efforts to aid wounded Libyan rebels by deploying a hospital ship to treat them and helping them get to European medical facilities, US Senator John McCain said Monday. "This is an urgent humanitarian need," McCain, the top Republican on the Senate Armed Services Committee, said in a statement after Libya's transitional government and NATO inked a deal opening part of the country's airspace. "I continue to urge the administration to take immediate steps, including the deployment of a US hospital ship to Libya or Malta and transporting wounded Libyans to US...