Once the backbone of the Air Force, the world will never see another one fly.

Hante Mayıs 24, 2022

That'd be the Lockheed C-141 Starlifter, heavy lifter for decades, now all ingots save for a few museum pieces like 70013 here at the Pima Air Museum.

The C-141 was made from 1963 to 1968, and during that time, 285 were built. They could carry up to 92,000 lbs. of cargo, 154 troops or 123 paratroopers, which they could drop via the rear ramp and two side doors.

The original C-141As had so much lifting ability that they were often loaded to the capacity of their cargo holds without reaching gross weight, so between 1977 and 1982, almost all of them were cut and had 23 feet added to their fuselages, "stretching" them so that they could carry more. These stretched aircraft were redesignated as the C-141B.
63 of these were further upgraded in the 1990s with new avionics and nav gear, and these were redesignated as the C-141C.

During the life of the C-141, 19 of them were destroyed in crashes around the world. The rest soldiered on, moving troops and materiel around the world. They may have lacked the glamour of the fighters or the bombers, but they got the job done for over 40 years.

By 2004, they were all relegated to Air Guard units. The last ones flew in 2006, at which point they were all retired.

67-0013 is a C-141B that flew from 1967 until it was transferred to AMARC at Davis Monthan, better known as "The Boneyard". Almost every C-141 ever made wound up there and most left in very small pieces.

15 of the original 285 still exist, all as static display aircraft like 67-0013 here. None will ever fly again.

Sad. But at least I saw and touched this one.