As the U.S. military formally ends operations in Iraq, four top expert voices in the debate on the war differ over whether it merited the cost in blood, treasure, and U.S. credibility.

Did President Obama’s troop drawdown plan for Afghanistan undercut the campaign against the Taliban or was it too limited to meet U.S. goals? CFR President Richard N. Haass and Senior Fellow Max Boot…

Which policies have worked and which ones need work ten years after the worst terrorist attacks in U.S. history? CFR experts examine ten issues that have preoccupied U.S. planners.