Totally "bogus" BS! The Santa Fe Branch was abandoned (9/1/1941) and rails removed (1942), before the Manhattan Project at Los Alamos got underway. I believe the misconception of the Chili Line having served Los Alamos stems from a History Channel special about the development of the atomic bomb that showed Oppenheimer (sp?) stepping down from a narrow gauge "San Juan" vestibule coach. He did own property in the Los Alamos area and his knowledge of the area probably played a key role in the selection of the remote site. He was probably enroute to Los Alamos. This subject has been previously discussed on this and other sites over the years.