Increased competition among the services resulting from the New Look compelled Wilson to deal with the perennially troublesome question of service roles and missions, complicated by the introduction of new weapons, especially missiles. He noted in his semi-annual report at the end of FY 1956 that the services, which had eight categories of guided missiles available for various tasks, could not agree on their respective roles and missions in relation to these and other planned missile systems. Also at issue were aircraft types for the individual services and Air Force tactical support for the Army. To address those and other nagging questions, Wilson issued two important documents. The former, a memorandum to members of the Armed Forces Policy Council on November 26, 1956, dealt with five points of contention. First, Wilson limited the Army to small aircraft with specifically defined functions within combat zones. On the matter of airlift adequacy, which the Army questioned, the secretary declared current Air Force practices acceptable. As to air defense, the Army received responsibility for point defense of specified geographical areas, vital installations, and cities; the Air Force became responsible for area defense and the interception of enemy attacks away from individual vital installations; and the Navy could maintain ship-based air defense weapon systems. Wilson assigned to the Air Force primary responsibility for tactical support for the Army, although the Army could use surface-to-surface missiles for close support of its field operations. Finally, the secretary gave the Air Force sole authority to operate land-based intermediate-range ballistic missile (IRBM) systems and the Navy the same responsibility for ship-based IRBMs. He enjoined the Army from planning operational employment of missiles with ranges beyond .