I'm talking to people all of the time. So it hasn't really had a big impact. Access is never my main concern anyway. If you keep digging and making phone calls you can get stories and not have to rely on the good graces of the Pentagon spokesperson. I am not in his good graces.

Afghanistan would have been difficult enough without Iraq. Iraq made it impossible. The argument that had we just focused on Afghanistan we'd now be okay is persuasive, but it omits the fact that we weren't supposed to get involved in nation-building in Afghanistan.In my new book, I open with a quote from Donald Rumsfeld. In October 2001, he said of Afghanistan: "It's not a quagmire." Ten years later there are 150,000 Western troops there.

The humanitarian argument is so selective I find it difficult to swallow. It's not even so much about the choice as to where we should get involved and where we shouldn't.

If the thumbnail version of the Iraq war was that Bush lied about WMD, the thumbnail version of Obama's war in Afghanistan is that the generals pushed him into a war he didn't want to fight.

A soldier in Iraq said that he wanted to "punch Donald Rumsfeld in the gut, then in the face" or something like that. He wanted me to use his name, but I knew he'd get in trouble, so I didn't. However, I felt it was a great quote because it summed up the frustration of those guys at that moment.

Inside the White House there were always extreme amounts of doubt about whether they should be escalating in Afghanistan. In fact, most of the president's advisers said, "This is probably not going to work." A lot of people in the military said, "This is probably not going to work."

The fact is, psychiatric help is not widely available to CIA agents - and as in the military, there is a stigma attached to admitting post-traumatic stress.