Studying nighttime images of the Earth taken from satellites could go a long way toward building policymakers understanding of disasters around the world, and how to manage risks. That's according to the UN's latest Global Assessment Report on Disaster Risk Reduction. Eleanor Stokes is a contributing author to the report, and helps lead the science team for a project called Black Marble. The joint effort by NASA and the Universities Space Research Association captures nighttime data around the globe every single night. Stokes is a senior scientist at USRA's Earth from Space Institute in Columbia, Maryland, and she joined the Federal Drive with Tom Temin to discuss more.