To batter a large portion of the country. Rainfall causing devastating flooding. Brennan the Arkansas River has reached its highest level in recorded history. And we join u. S. Fighter pilots at the top of the world, training to beat back the russian attacks. Its a deterrence exercise. We know that russia is going to watch. Brennan good evening. Im margaret brennan. This is our western edition. This has been a huge day in washington. Special Counsel Robert Mueller spoke publicly for the first time about the russia investigation, and explained why he could not exonerate the president of a crime. We will get to that important story in just a moment. But first, norah odonnell, the incoming anchor of the cbs evening news, has an exclusive interview with the man in charge of boeing. Dennis muilenburg gave his first interview since two overseas crashes killed 346 people and led to the grounding of all 737 max jets. Thats boeings best seller. Norah joins us now. And, norah, there are a lot of