Russia’s newest commercial airliner disappeared Wednesday during a commercial exercise near Jakarta, with 44 passengers on board, Russian state media reported. The plane reportedly went missing around 2 p.m., after the pilot asked permission to descend from 10,000 feet to 6,000 feet. The plane then began making its descent but vanished near a mountainous area. By the time it was due to return, it would have burned up all its fuel.