> OSD, however, refused to tolerate this kind of intransigence and in May 1966 McNamara ordered a joint review of the commonality issue. Conducted over the next 18 months,
the review confirmed that the needs of the Air Force and Navy could not be met by a single airframe. The two services argued that attempts to merge their requirements would produce, at exorbitant cost, a grotesque mutation with increased weight, and reduced performance.<p>The truth of this is again illustrated by the Joint Strike Fighter F-35 with its massive cost overruns and its reduced performance.