Illustration of a Bell 47 helicopter, painted orange, flying over the steeps of a snowy mountain top, a mountainous range and pine trees are visible on the horizon.

Photograph of a man standing outside the UH-1A Iroquois helicopter during its development. He rests on hand on the exterior of the aircraft and the other on his hip. He wears a patterned sweater and dark slacks. The helicopter rests on the concrete floor in a large interior space.

Two photographs of a model during the development of the UH-1A Iroquois helicopter.

Photograph of a large, cylindrical fuel tank being moved into the interior of the UH-1A Iroquois helicopter during its development. The fuel tank is suspended by a cable from a lifting davit. An individual is partially visible standing behind the lifting mechanism. The US Army logo is printed on the tail boom of the helicopter. The helicopter rests on a concrete floor in a large interior space.

Photograph of the landing skids of a helicopter resting on a concrete surface during the development of the UH-1A Iroquois helicopter.

Photograph of the UH-1A Iroquois helicopter during its development. Two men ease a large, cylindrical fuel tank into the helicopter that is being suspended by a lifting davit. The man on the left wears a tweed suit jacket with dark pants. The other man wears a patterned sweater and dark slacks. Other machinery is visible in the background.

Photograph of the UH-1A Iroquois helicopter in a large aircraft hangar during its development. Two men ease a large, cylindrical fuel tank into the helicopter that is being suspended by a lifting davit. The man on the left wears a tweed suit jacket with dark pants. He holds on to the end of the tank. The other man wears a patterned sweater and dark slacks. He reaches up for the crank on the lifting mechanism. Other machinery is visible in the background.