My hon. Friend knows far more about such military matters than I do. That is my understanding of the position: that a no-fly zone—and I will say more about this later—is perfectly feasible. It is question of whether the international community has the political will to face down the Russians and the Syrian helicopters by setting one up.
Fourthly, there was the failure to secure unfettered access for the United Nations. It is unprecedented in recent years for those bent solely on looking after their fellow citizens to be unable to gain unfettered access to very dangerous zones. This gives me an opportunity to pay tribute to the extraordinary bravery of those who work in the humanitarian world, doing nothing other than try to assist their fellow human beings and bring them sustenance, help, medicine and support.