nevada s governor declared a state of emergency. treacherous trip. the u.s.-canada border is largely desolate, undefended and now seeing a spike of illegal crossings. cbs news is there. and later, kicking off super bowl lvii. history being made by the quarterbacks and the navy aviators doing the flyover. we ll also have the line-up of the big game commercials. wow. this is really good, right? or am i just acting? announcer: this is the cbs weekend news, from chicago with adriana diaz. good evening. there is breaking news tonight. an american fighter jet has shot down another unidentified object, this time over canada. just one day after a warplane took similar action over alaska and one week after a chinese spy balloon was shot down off the carolina coast. canadian prime minister justin trudeau says the shootdown happened over the yukon territory. in a tweet tonight trudeau said he ordered norad to take down the object that had violated canadian air space. cbs s