The hon. Gentleman will recognise that that is, in part, in the realms of speculation. As Members will know, Russia and the US alone are the countries bound by the treaty, although it obviously impacts on many other countries across the world, especially in Europe. We are engaging, and will continue to engage, with the United States Administration to understand their assessment, although obviously, I, too, have read some of the speculation to which the hon. Gentleman refers. Fundamentally, this treaty concerns Euro-Atlantic security and can be effective only if there is full compliance.