"The MUSCLE SHOALS (IGLOO WHITE) program was initiated on 16 September 1966, with a decision by Secretary of Defense, Robert S. McNamara, to develop a system to interdict North Vietnamese infiltration into South Vietnam.
"The initial sensor program was called PRACTICE NINE until 14 June 1967, ILLINOIS CITY until 15 July 1967, and DYE MARKER until 8 September 1967, when MUSCLE SHOALS was adopted to indicate the air-supported subsystem in eastern and central Laos.