Photograph of a particle separator during the development of the UH-1C Iroquois helicopter.

Photograph of a particle separator during the development of the UH-1C Iroquois helicopter.

Photograph of UH-1E pilot armor seat not yet installed during the development of the UH-1E Iroquois helicopter.

Photograph of a Kenneth (Ken) Wernicke holding an airplane model.

Photograph of a UH-1E instrument panel during the development of the UH-1E Iroquois helicopter.

Photograph of a signed UH-1B Iroquois helicopter assembly in a workshop. Beneath the date "May 19, 1966," a circled note handwritten on the exterior of the helicopter reads, "Last 'B' Assy at Hurst." Many signatures surround the note. The legible names include: C.D. Fielding, M.H. Lantrip, Dale E. Cole, D. E. Willoughby, "Big John" Schober, H. E. Reynolds Jr., O.A. Coon, Willy Hightower Bellamy, Bill Pope, and Bill Stepp. A man is visible sitting in the background, out of the camera's focus.

Photograph of individuals surrounding the last UH-1B Iroquois helicopter off the assembly line at Hurst, Texas. Men stand on either side of the helicopter in a large, open bay doorway.

Photograph of of the installation of a clamp hydraulic system 540/UH-1B, during the development of the UH-1B Iroquois helicopter.

Photograph of four mechanical parts for a UH-1B Iroquois helicopter. They are arranged in a row in front of a solid backdrop.

Photograph of a closeup of mechanical components inside a UH-1F Iroquois helicopter. A serial number and the date "3-12-65" are handwritten on a large piece of tubing that runs through the assembly.

Photograph of machine guns on YUH-1D, during the development of the YUH-1D Iroquois helicopter.

Photograph of a UH-1E alternate and transmission, photographed during the development of the UH-1E Iroquois helicopter.

Photograph of UH-1E battery compartment, photographed during the development of the UH-1E Iroquois helicopter.

Photograph of UH-1E center fuselage and cargo compartment; center fuselage tail boom attachment, photographed during the development of the UH-1E Iroquois helicopter.

Photograph of a UH-1E center fuselage tail boom attachment, photographed during the development of the UH-1E Iroquois helicopter.

Photograph of a UH-1E electrical compartment photographed during the development of the UH-1E Iroquois helicopter.

Photograph of a UH-1E ford mooring tiedown point, photographed during the development of the UH-1E Iroquois helicopter.

Photograph of UH-1E ford mooring tiedown points, photographed during the development of the UH-1E Iroquois helicopter.

Photograph of a UH-1E instrument panel & overhead console, photographed during the development of the UH-1E Iroquois helicopter.

Photograph of UH-1E nose compartment, during the development of the UH-1E Iroquois helicopter.

Photograph of UH-1E nose compartment under construction, during the development of the UH-1E Iroquois helicopter.

Photograph of UH-1E radio and baggage compartment, photographed during the development of the UH-1E Iroquois helicopter.

Photograph of a UH-1E radio compartment, photographed during the development of the UH-1E Iroquois helicopter.

Photograph of a UH-1E rescue hoist (interior), photographed during the development of the UH-1E Iroquois helicopter.