Israel prepares for a brutal ground assault on Gaza -- House Republicans do the Speaker dance all over again -- New CDC director on In Depth

About a million Israelis living in the northern territories of the country were sent scrambling for bomb shelters today, over reports that there was a massive incoming attack from Lebanon and Syria ... likely coming from Hezbollah fighters. The reports turned out to be a false alarm, but it shows how on edge Israel remains ... and how the possibility of a much broader and more destructive war remains very much in play.  We'll go In Depth on all of it. Republicans might have finally resolved their Speaker of the House drama, but there's still plenty of room for chaos. And for the second half hour of today's In Depth:  the Centers for Disease Control and Prevention have a new director, and we'll be welcoming her in studio. CDC director Dr. Mandy Cohen will be here to talk COVID, the flu, RSV ... and growing vaccine hesitancy.