The Arizona National Guard is pitching in with Hurricane Irma relief efforts.  More than a dozen aerial port specialists from the Air National Guard's 161st Air Refueling Wing at Sky Harbor left Tuesday for the U.S. Virgin Islands.  They'll become part of the effort to establish an aerial port, which receives people and cargo by air to help provide relief.  They're beginning their mission just as a group of almost 50 Arizona Guardsmen returned from hurricane recovery efforts in Texas.