Of course air-power works. The only examples we have, however, are large, cumbersome nations against far smaller, less equipped nations -- and Vietnam had far too many things going against it to be added to the stew. It just stands to reason that air-power is king. Humans by nature think and respond in 2D planes. It's genetic. You can teach a person to look up on occasion, but he'll eventually become desensitized to the prospect of an aerial threat, reverting back to the reality of a horizontal view of a supposed ‘more’ potential enemy. A Mustang or Spitfire suddenly dropping down from the Sun on a moving column surprised more than a few of the Divine Wind in Polynesia and the Philippines.

We do seem to choose our battles well these days,
Dan