For top U.S. general, a sober return to still-divided Iraq

BAGHDAD (Reuters) - On his first trip to Iraq since American troops returned this summer, the top U.S. general was dogged by a nagging question from troops.

At meetings over the weekend, soldiers and Marines asked General Martin Dempsey variations on the same basic question: Even if the U.S.-backed campaign succeeds in rolling back Islamic State, what is to prevent this from happening again, years from now?