Some 5,000 union members, led by the United Mine Workers of America, march outside the William S. Moorhead Federal Building on Thursday in Pittsburgh. The city hosted two days of public hearings by the Environmental Protection Agency on stricter pollution rules for coal-burning power plants.
Gene J. Puskar/AP
Brig. Gen. Mohammad Ali Mughdeed talks to the men he commands to protect the Mosul dam, a critical piece of infrastructure that supplies water and electricity. The dam is now close to the front line with the militants of the Islamic State in Iraq.