SYDNEY (AP) — A Sydney judge on Friday ruled that former U.S. Marine Corps pilot Daniel Duggan can be extradited to the United States on allegations that he illegally trained Chinese aviators, leaving the attorney-general as Duggan’s last hope of remaining in Australia. Magistrate Daniel Reiss ordered the Boston-born 55-year-old to remain in custody awaiting extradition. While his lawyers said they had no legal grounds to challenge the…