UK’s Prime Minister David Cameron had some thoughts.

Stability. Security. The peace of mind that comes from being able to get a decent job and provide for your family, in a country that you feel has a good future ahead of it and that treats people fairly. In a nutshell, that is what people in Britain want

And

I agree that we should avoid sending armies to fight or occupy. But we need to recognise that the brighter future we long for requires a long-term plan for our security as well as for our economy. True security will only be achieved if we use all our resources—aid, diplomacy, our military prowess—to help bring about a more stable world.

And

The creation of an extremist caliphate in the heart of Iraq and extending into Syria is not a problem miles away from home. Nor is it a problem that should be defined by a war 10 years ago. It is our concern here and now. Because if we do not act to stem the onslaught of this exceptionally dangerous terrorist movement, it will only grow stronger until it can target us on the streets of Britain. We already know that it has the murderous intent. Indeed, the first ISIL-inspired terrorist acts on the continent of Europe have already taken place.

And

[W]e need a firm security response, whether that is military action to go after the terrorists, international co-operation on intelligence and counter-terrorism, or uncompromising action against terrorists at home. On Friday we agreed with our European partners that we will provide equipment directly to the Kurdish forces; we are now identifying what we might supply, from body armour to specialist counter-explosive equipment.

And

We are in the middle of a generational struggle against a poisonous and extremist ideology, which I believe we will be fighting for the rest of my political lifetime. We face in ISIL a new threat that is single-minded, determined, and unflinching in pursuit of its objectives. … It makes no secret of its expansionist aims.

And concluding [emphasis added]:

This is a clear danger to Europe and to our security. It is a daunting challenge. But it is not an invincible one, as long as we are now ready and able to summon up the political will to defend our own values and way of life with the same determination, courage, and tenacity as we have faced danger before in our history. That is how much is at stake here: we have no choice but to rise to the challenge.

I disagree with Cameron’s statement only to this extent: the terrorists have created a “caliphate” only to the extent we recognize it; otherwise, it’s only a figment of the fevered imagination of a mob of terrorists.

Beyond that, what he said. He also has some concrete ideas on how to deal with domestic and domestic-grown terrorists. RTWT.

If only our President had some thoughts….