>> announcer: this is "today "with savannah guthrie and hoda kotb live in studio 1a in rockefeller pla. >> thanku, everyone, for joining us on this busy, busyay thurmorning. >> the faa has at last grounded those max 8 airplanes at the center of twocrashes. a lot of people said finally it came. >> critics saidoo it much too long for the faa to do it. in a minute we'll talk to thera adminir of the faa. as mentioned, the u.s. has now joined the rest of the world grounding the fleet in the wake of two recent air crashes. >> we'll talk to the head of the faa, but first tom costello jos us from reagan national with the very latest on this. hey, tom, goodin mo >> reporter: good morning. if you're flying today be prepared for cancellations, and it's not just because of the max 8 and max 9. weave a massive snowstorm really messing things up.