Director of Environmental Protection Agency Scott Pruitt is sworn in by Justice Samuel Alito after the U.S. Senate confirms him over the objections of Democrats and environmentalists worried he will gut the agency.
Mourners hold a vigil a day after four people were killed by a driver at a parade in Stillwater, Oklahoma.
Oklahoma governor Mary Fallin issues 37-day stay of execution for death row inmate Richard Glossip, delaying his execution for more than a month.
A giant vortex develops near a dam in Lake Texoma on the border between Oklahoma and Texas.
Disgraced Oklahoma student apologized for his action, after a meeting with civil rights leaders, saying he will carry the shame of his words for the rest of his life.
The University of Oklahoma expels two students linked to a video showing members of a fraternity singing a song filled with racial epithets.
University of Oklahoma bands together to discredit racist behavior of campus fraternity.