Why do you believe General Harkins and others in the United States' military and intelligence communities put so much stock into the opinions of Vietnamese military leaders like General Huynh Van Cao,

General Harkins finds John Paul Vann to be a bit too abrasive at times and is more inclined to trust the instincts of the natives of the country. While this turned out to be an ineffective strategy, General Harkins is under the impression that the South Vietnamese would better understand their foes and the terrain of the country.