Delta Air Lines said Thursday that it has banned retired U.S. Navy SEAL Robert O’Neill, the man credited with killing Osama Bin Laden, for allegedly failing to wear a mask during a recent flight. O’Neill, 44, tweeted that he had been banned from the airline “for posting a picture.” Earlier this week, O’Neill posted a now-deleted mask-less selfie while sitting on a Delta plane, with the caption, "I'm not a [expletive]." “Part of every customer’s commitment prior to traveling on Delta is the requirement to acknowledge our updated travel policies, which includes wearing a mask,” a Delta spokesman told FOX...