The Islamic State fighters in Mosul are dead men walking and I think they increasingly know it.

There [in Afghanistan] is also a growing insurgency threat from al-Qaida, the Taliban and other extremist elements, some of which comes from the tribal areas of Pakistan, as well as from the Northwest Frontier province and Baluchistan.

Al-Qaida in particular remains dangerous, and there [in Iraq] is some residual militia and special group presence. There are still between 20 and 30 attacks per day, still periodic car bombs and still loss of innocent civilians.

ISIS is on its way to defeat but terrorism threat persists.

Progress in Iraq has always been about teams of people and teams of teams - and ultimately about young men and women, Iraqi as well as people from the coalition.

In Afghanistan you are not rebuilding, you are building. There is very limited infrastructure and extreme terrain, with deserts in the south and mountains so high in some areas that helicopters don't even fly well at a certain altitude because the air becomes so thin. The country has a serious problem of illiteracy, especially after so many years of war and Taliban rule.

We cleared many of their towns and cities and rural areas of al-Qaida Iraq and other insurgents.