Fareed Zakaria Gps

How much immigration is enough? Fareed and David Frum both offer their takes.  On NATO's 70th anniversary, Secretary General Jens Stoltenberg looks at the future of the alliance in a changing world.  And what would be a world run by women by like?  Tina Brown joins Fareed. Guests: David Frum, Jens Stoltenberg, Tina Brown, Michael Lewis. via Knit