For heaven's sake, this is 2015. I've run the largest technology company in the world. Let me assure you we know how to build an employer verification system that would work. We can solve this. We just need to do it.

There is a difference between Iraq, where you have Sunni, Shia, and Kurds put together after the First World War by the Western powers. It doesn't work. It needs to break up into three parts.

You know, since the 6th century, Sunni and Shia have been fighting.

We've just let too many things happen. And now, try to turn around and fix it. Getting involved in a [Syria] civil war directly was never something I thought made sense.

We've got to unite our country again, because we're stronger when we are united and we are weaker when we are divided.

Let me just suggest to everybody, and I hear - last February [2015], I said we needed to have people on the ground in a coalition with Europe and our allies. This is not going to get done just by working with the Sunnis. And it is not going to get done if we just embed a few people.

We don't have to fight all the time. It can be done, and we will be great when we join together.