Drilling rigs dot the landscape near Calumet, Okla., in April 2013. Oklahoma's economy blossomed during the domestic fracking boom, but as the price of crude oil drops, that could change.
Iranians commemorate the 36th anniversary of the Islamic Revolution near the Azadi Tower in Tehran on Wednesday. While many Iranians would like to reorder relations with the West, there's also plenty of skepticism about whether it will actually happen.
A functioning oil rig sits in front of the capital building in Oklahoma City, Okla. The oil industry is an important employer in the state, but officials are concerned a technique used to dispose of wastewater from oil extraction is behind a surge in earthquakes here.