Displaced civilians from Ramadi wait to receive humanitarian aid from the United Nations in a camp in the town of Amiriyat al-Fallujah, west of Baghdad, Iraq, Friday, May 22, 2015. The United Nations World Food Program said it is rushing food assistance into Anbar to help tens of thousands of residents who have fled Ramadi after it was taken by Islamic State militant group. (AP Photo/Hadi Mizban)

US officials: Iran enters Iraqi fight for key oil refinery

Iran has entered the fight to retake a major Iraqi oil refinery from Islamic State militants, contributing small numbers of troops —some are operating artillery and other heavy weapons — in support of advancing Iraqi ground forces, U.S. defense officials say.

Signs marking beach closed to fishing and harvesting are seen while cleanup crews in the background shovel and rake contaminated sand into bags at El Capitan State Beach, north of Goleta, Calif., Friday, May 22, 2015. Officials say the sheen of oil is now thinner than a coat of paint and is becoming harder to skim from choppy, wind-driven waters. A state parks official says Refugio and El Capitan state beaches and campgrounds will be closed until June 4. That's a week longer than originally announced. The spill from the May 19 break now covers nearly 10 square miles.(AP Photo/Michael A. Mariant)

California oil spill harder to clean up in choppy waters

Federal regulators ordered Plains All American Pipeline to drain the pipe that leaked, test the metal in the damaged section of pipe, and complete a series of steps before it can ask to resume pumping oil through the pipe to inland refineries.