Secretary of Defense Melvin R. Laird, center, hosts the dedication of Arnold Corridor, honoring the late General of the Air Force H. H. (Hap) Arnold, the first general of the Air Force with a five-star rank. Unveiling the plaque, located on the "E" ring between corridors 8 and 9, is Mrs. Arnold, the general`s widow. On the left is Secretary of the Air Force Robert C. Seamans Jr