After being married for over 37 years, I showed extremely poor judgment by engaging in an extramarital affair.

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.

Over the last few years they have done a superb job in their fight against al-Qaida. As you may recall, our embassy in Jedda (in Saudi Arabia) was overrun some four years ago and a number of foreign workers went home because of violence against them.

The president and I sat down in the Oval Office, and he expressed very clearly that what he wants from me is my best professional military advice.

I am not a politician, and I will never be, and I say that with absolute conviction.

Items of interest will be located, identified, monitored, and remotely controlled through technologies such as radio-frequency identification, sensor networks, tiny embedded servers, and energy harvesters - all connected to the next-generation internet using abundant, low-cost, and high-power computing.

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