Summary: Coalition to Stop Gun Violence's Media Director Andrew Patrick: After Latest School Massacre Students Organize to Challenge NRA's Power in Congress; Greenpeace USA's Climate and Energy Campaigner Mary Sweeters: Opposition Building to Trump Plan to Open 90 Percent of U.S. Coastline to Oil and Gas Drilling; University of Colorado, Boulder's Assistant Professor in Media Studies Nathan Schneider: Popular Social Movements Through History Needed Hope to Succeed. Visit BTLonline.org for more information or for our archive, updated Wednesdays after 6 p.m. ET; Facebook.com/BetweenTheLinesRadioNewsmagazine, Twitter @BTLRadioNews.