On a surprise visit that lasted less than five hours, the US president also met with Iraq's prime minister.
Gen. Raymond Odierno outlines the challenges facing US forces as they continue to tamp down violence while working toward a June deadline to withdraw from Iraqi cities.
As violence falls in Baghdad, Al Qaeda in Iraq is taking its fight to desert outposts and rural villages.
After three years of violence, pilgrims return to Karbala's shrine.
The Sunni insurgent group may strike back, but Iraq experts say it's unlikely they will ever achieve the level of power they once wielded.
Violence has plummeted and US forces are pulling back, but the year ahead will test the staying power of gains throughout the country.
The financial crisis, war on two fronts, and, above all, the US election make 2008 historic.
Many Iraqis say passage of the US-Iraqi security pact ushers in a new era in which US military power will be replaced by Iraqi political power.
Despite attack, Dulaim vows to bar Al Qaeda in Iraq, which it ousted from the town last year.