Photographer Paul Seibert was so high that the pilot was required to wear an oxygen mask to fly the aircraft legally.
“I’ve heard of people doing 10,000 feet and even 12,500 feet. No one to my knowledge, and to the knowledge of the flight team in N.Y. had ever been to 15,000 feet,” he continues.
“At these heights, there are not only atmospheric conditions to fight with, but also physiological responses to a lack of oxygen in an unpressurized aircraft. The pilot was on oxygen to safely pilot the helicopter.”