back to be with you. >> he is lying. >>> good morning to our viewers in the west and welcome to "cbs this morning" on this monday, march 22, 2021. i'm gayle king. that's anthony mason. that's tony dokoupil. >>> breaking news for you on piem a potential new vaccine to fight the coronavirus in the u.s. >>> and the latest on the situation at miami beach where spring breakers clashed with police. >>> and the biden administration says the border is closed as the number of unaccompanied minors increases. we'll ask senator chris murphy why he said he fought back tears visiting a border facility for children. >>> and it was a weekend of upsets in march madness. we'll talk to a legend of the women's game about inequality and what the ncaa can do about it. >>> but first here's today's