One man who has suggested that more American troops are not the answer is Russia’s ambassador to Afghanistan, Zamir Kabulov, who was a K.G.B. agent in Kabul during the Soviet occupation in the 1980s. Last October Mr. Kabulov told my colleague John Burns that the U.S. had “already repeated all of our mistakes,” and moved on to “making mistakes of their own, ones for which we do not own the copyright.” One of the biggest mistakes the Soviets made, Mr. Kabulov said, was letting the force grow too large. “The more foreign troops you have roaming the country,” he said, “the more the irritative allergy toward them is going to be provoked.