 The Federal Aviation Administration says the massive number of cancellations yesterday caused a domino effect going into the weekend. The outage was caused by an error in a Microsoft update issued by cybersecurity firm CrowdStrike. Billy Horschel is the leader of the Open through three rounds in Scotland. He shot a 69 today and sits four shots under par. Six golfers are tied for second at three shots under, including Sam Burns, Thurston Lawrence, Russell