A man armed with a handgun and a rifle killed at least four people at a hospital in Tulsa on Wednesday before killing himself. Read more: https://wapo.st/3madMRk. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/