Titan II Butterfly Valve Lock Assembly
12 December 2009. At the Titan Missile Museum / Site 571-7, Sahuarita, AZ.
The butterfly valve physically locks the fuel line, requiring a six character code to unlock.
Zeiss 21mm/2.8 ZF.2 Distagon (@ f/5.0), Nikon D3s camera (@ ISO 400); available light, handheld.
No emulsions were harmed in the making of this image.