House Democrats launched an impeachment inquiry against President Donald Trump last week. What does this mean for nuclear policy and national security? Ro Khanna, US Representative from California's 17th congressional district, joins Joe Cirincione for a special interview on the explosive allegations against the US president and the need to prevent a new war of choice in the Middle East. Rep. Khanna, with Rep. Matt Gaetz, introduced a bipartisan amendment to the annual National Defense Authorization Act to prevent federal funds from being used for any military force against Iran without congressional authorization. "In the Silo" provides an exclusive look at the August 6 protest in front of the Lawrence Livermore National Laboratory, featuring narration and field recordings by Ploughshares Fund Development Associate Elissa Karim. News summary with Mary Kaszynski, Joe Cirincione, and Abigail Stowe-Thurston of the Center for Arms Control and Non-Proliferation. Joe Cirincione answers a question from Susan in California.