USA need to win this war for their prestige. Military and weapon contractors will milk this to the end. Obama can't withdraw as he compaigned for this war. India and Israel and their lobbies will continue to support the war as it serves their interests. I don't see a way out of it. Infact Indian and Israeli intelligence agencies are very much involved in this and in the near future they will supply Taliban with a dirty bomb and plan to attack nuclear facilities inside Pakistan, and you will see lot of uproar about the Pakistani Nuclear Weapons. USA, India, Israel, NATO with the help of UN will put pressure on Pakistan to get rid of it's nuclear weapons or face worst sanctions ever possible. Thus further destabilizing Pakistan to the brink of collapse giving birth to millions of radicals, militants, fundamentalists and Taliban as Pakistan is very populous country. In such a scenario any mis calculation can be very costly as loose nuclear weapons is the last thing the world wants.

Guess, only the gardener has the right to uproot the plants, he sowed and allowed to grow..