Emma Belcher, director of the Nuclear Challenges program at the MacArthur Foundation, joins Joe Cirincione for a discussion on the role that philanthropy plays in creating a safer, more secure world, and what the current arms race means for the fight against nuclear threats. News analysis with Ploughshares Fund Director of Policy Tom Collina, Roger L. Hale Fellow Akshai Vikram, and Erica Fein of Win Without War. Joe Cirincione answers a question from Mike from Virginia.