reporters and the nation on the extraordinary information that was announced from the podium at the white house that the u.s. military has shot down what's being described as an unidentified object over alaska, just within about the last 90 minutes or so. they're not calling it a balloon. nobody is saying it is a balloon. they are saying it was traveling at an altitude, high enough, that made it a potential threat to planes in the sky, civilian planes in the sky. you heard from john kirby of the national security council saying president biden ordered the military to shoot this down out of an abundance of caution. courtney kube is with us, along with allie raffa, "new york times" white house correspondent, and msnbc political analyst, peter nicholas, along with retired four star general, barry mccaffrey, an msnbc military analyst. let me start with what we know, and what we do not know yet