most profound experience i can have. o donnell: flu season warning: why health officials are so worried. could we see a twin-demic of flu and covid. contaminated water: another michigan town with unsafe lead levels, endangering children for years. reporter: what water do you use to cook? the bottled water. reporter: to brush your teeth? bottled water. reporter: bathe? bottled water. o donnell: guns at airports: a record number of people trying to bring guns through security. which cities have the most culprits. cutting out salt: what the new f.d.a. guidance could mean for your favorite chain restaurant. and special assignment: a new recruit. helping capitol police heal. this is the cbs evening news with norah o donnell, reporting from the nation s capital. thank you for joining us. we are going to begin tonight