"It's like you're going into a room with an angry cat a big tiger. And the angry cat is Afghanistan and the big tiger is Pakistan. Pakistan has nuclear bombs. Pakistan has Bin Laden. Pakistan can destabilize India. And you're in that room and you're whacking the cat. And somebody says to you, 'Why are you whacking the cat?' And you say, "Oh, it's a cat-tiger strategy - it's an Afghanistan-Pakistan Strategy.' Really the reason we're whacking the cat is we don't know what to do about the tiger."
You can list to the full audio interview with Rory Stewart here. The interview with Rory begins at 5:45 point.