Ben Bradlee Jr. joins Walter Isaacson to discuss his book "The Forgotten."
Professor Michael Oppenheimer has been on the leading edge of climate science for decades.
Former Neo-Nazi Christian Picciolini discusses how terrorists become radicalized
Christchurch Mayor Lianne Dalziel vows to "snuff out" the "hatred" that led to the attacks
See Christiane and Singer watch and discuss a clip of his documentary on the Bosnian war.
The former Australian PM joins the show to discuss New Zealand's deadly terrorist attack
CNN Correspondents join live as students worldwide walk out of school for climate change.
A Harvard political philosophy professor on why society can't reason on political issues.
Jonathan Greenblatt & Peter Neumann discuss what is causing far-right terrorist attacks.
Two youth workers discuss why this is a public health issue and what they’ve learned
Neuroscientist Matthew Walker makes the case for sleep.
"Shout" author Laurie Halse Anderson how and why sexual abuse can shame many into silence.
Michel Martin interviews Arthur Brooks, president of the American Enterprise Institute
Christiane Amanpour sits down with pianist and international phenomenon Lang Lang
Larry Summers, Former President of Harvard University and Former U.S. Treasury Secretary