On last Saturday an Airbus A-321 of South Korean carrier Asiana with 200 people on board was obliged to an emergency landing because of an hail tempest. The aircraft, which was flying from Seoul to the capital of Cheju island, reported serious damages, as the loss of the snout’s shell, and the radar’s impairment. The big ice grains cracked also the glasses of the cockpit, at the point that practically it...