By Mike Stone WASHINGTON (Reuters) – Seventeen members of Congress told U.S. Defense Secretary Lloyd Austin to speed up a Pentagon security review of a Ukrainian request for large armable drones, according to a letter dated Wednesday and seen by Reuters. The Biden administration’s plan to sell four large, armable drones to Ukraine hit a snag in June because of a fear the unmanned aerial system’s sophisticated surveillance equipment might fall into enemy hands, sources had previously told Reuters. The technical objection to the sale was raised during a deeper review by the Pentagon’s Defense Te…