This short video claims the Phantom flight is the first ever to have gone beneath a glacier via an ice grotto. The video was taken at the Mendenhall Glacier in Alaska. It starts off with an inane 13 second ad before going into the Phantom flight. The brief narrative is in Norwegian.
http://www.vgtv.no/#!/video/79111/unike-dronebilder-viser-landskapet-under-isen
http://www.vgtv.no/#!/video/79111/unike-dronebilder-viser-landskapet-under-isen
