Faith Lapidus tells about her life. Wilma Mankiller was the first woman to lead the Cherokee Nation, based in Oklahoma.

VOA: special.2010.04.09

Oklahoma-based Hobby Lobby calls itself a "biblically founded business" and is closed on Sundays.

NPR: Obama Birth Control Mandates Loosens Lawsuits

"It's not anyone's intent ever to rip a child away from a loving home, " said Todd Hembree, the Tahlequah, Oklahoma-based tribe's attorney general.

CNN: Supreme Court tackles Native American adoption dispute

Oklahoma-based Mathena makes and rents out specialist equipment used in fracking.

BBC: Weir acquires US drilling firm Mathena for $240m