The KB-50 was introduced to the Air Force in 1948. 370 were built. They were all retired by 1965 when it was discovered that metal fatigue and corrosion had an effect on all of them.
In distance on left side white Boeing 767-269 reg. HS-KOA Sunny Airways.
A classic Douglas DC-7 just after sunrise.
Almost all helipads are occupied at the only Heliport inside the Grand Canyon.