Jim Jensen, Executive Director of the Office of Congressional and Government Affairs, a branch of the National Research Council, discusses how scientific research shapes public policy.

Aircraft and Iceland's volcanic ash cloud

Welcome to Science Sessions, the PNAS podcast program. Listen to brief conversations with cutting-edge researchers, Academy members, and policymakers as they discuss topics relevant to today's scientific community. Learn the behind-the-scenes story of work published in PNAS, plus a broad range of scientific news about discoveries that affect the world around us.