6/19: The Daily Report with John Dickerson

Jeff Glor reports on severe weather threatening the south, what's behind an app used to track migrants in the U.S., and what's next for the markets and A.I. as Nvidia becomes the world's most valuable company.

6/19: The Daily Report with John Dickerson
Jeff Glor reports on severe weather threatening the south, what's behind an app used to track migrants in the U.S., and what's next for the markets and A.I. as Nvidia becomes the world's most valuable company.