Hello Sanjay News Today

♪ thats how i feel on the set sometimes. >> so lonely. welcome back. a surprising epidemic affecting some 60 million americans. loneliness. dr. sanjay gupta has teamed up with o magazine. its called the just say hello campaign. listen to this. >> when was the last time you said hello to a stranger passing you on the street or a friend you hadnt seen in years? >> hi. >> hi. >> how you doing? >> hello. >> oh, hello there. look at you. hey girl. looking good. >> thanks ellen. >> oh its going to...