Fighting in cities is a totally different endeavor than obviously fighting out in the open.

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

People often ask, why aren't you reading about what it is you're working on right now? And the truth is, you only get three pages a night before your eyelids close.

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.

I will not ever run for political office, I can assure you of that.

US forces have been increased [in Afghanistan ] from some 21,000 to about 31,000 over the past two years and a number of coalition countries have also increased their forces, there still are not sufficient troops.

Money can be a very important form of "ammunition," although we should never forget that when you're being shot at the most important ammunition is real ammunition.