on the installation. By April 1954, "Little Pentagon" development had cost $35,000,000. Automatic activation After the 1954 Air Defense Command blockhouse was built at Ent Air Force Base, where the joint 1955 Continental Air Defense Command was activated, in August 1955 OSD approved the automatic activation of Raven Rock's Alternate Joint Communication Center on declaration of air defense warning or notice of surprise attack (SAC similarly completed a bunker in 1955). The AJCC was equipped with command and control (C2) hardware by the end of 1955. 1956 War Room Annex In July 1956 at Raven Rock, a joint War Room Annex was established and was operated by the Air Force, and Raven Rock's readiness was broadened in April 1957 [for] activation prior to emergency if JCS thought it necessary. By 1959, the services as well as JCS regarded Raven Rock as their primary emergency deployment center. For the Air Force, it served as Headquarters USAF Advanced, capable of receiving the Chief of Staff and key officers. After President Dwight D. Eisenhower expressed concern about nuclear command and control, a 1958 reorganization in National Command Authority relations with the joint commands was implemented. On 1 July 1958 Raven Rock's USAF facility, ADCC (Blue Ridge Summit), became one of the 33 NORAD Alert Network Number 1 stations (but with receive-only capability as at TAC Headquarters, Sandia Base, and the Presidio at San Francisco.) On 20 October 1960, the JCS instructed the Joint Staff to establish a Joint Alternate Command Element (JACE) for rotating battle staffs to Raven Rock for temporary duty. In November 1960, consoles at the Pentagon's Joint War Room became operational, and the Raven Rock JACE was activated on 11 July 1961 under USAF Brig. Gen. Willard W. Smith [with the 5] staffs permanently stationed in Washington and an administrative section at Ft. Ritchie—rotations began in October 1961 (Fort Ritchie also had the OSD Defense Emergency Relocation Site.) An expansion project by the Frazier–Davis–McDonald Company was underway in December 1961 at the "little Pentagon", and bunker personnel were evacuated during a 1962 fire. Pentagon construction to provide an entire JCS center at the Joint War Room opened the National Military Command Center (NMCC) in early October 1962. It was initially considered an interim center until a nearby Deep Underground Command Center (DUCC) could be completed after which Raven Rock would be phased out as superfluous, whichever version [50-man or 300-man