John Hickenlooper, then the governor of Colorado, arrived in Aurora the morning of July 20, 2012, to review the scene of the theater shooting where 12 people had been murdered hours earlier.

On the evening of July 19, 2012, Aurora’s Police Chief, Dan Oates, returned home to get some rest after a hockey game. Twenty minutes later, not long after midnight, he was woken up by a phone call from his deputy chief, Terry Jones.

The Center for Biological Diversity has filed a lawsuit aimed at forcing the Environmental Protection Agency (EPA) to reject Colorado's plan to bring down air pollution to safe levels because of a loophole allowing oil and gas operators to pollute at will.