Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/pbs-newshour-full-episode-july-17-2015 Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Friday on the News Hour... Friday on the NewsHour, authorities search for a motive in the attacks on military sites in Tennessee. Also: Secretary of State Kerry on selling the Iran nuclear deal, Planned Parenthood practices spark political controversy, Mark Shields and David Brooks analyze the week’s news, designing drones inspired by nature’s best flyers and running and leaping through a concrete jungle. Listen to the Broadcast Subscribe to the Full Show Podcast Segments From This Episode Investigators search for motive in Tennessee military shootings 2 min News Wrap: Texas grand jury to hear Sandra Bland case 3 min 'Very few red flags' to tip off authorities to Tennessee attack Iran nuclear deal deserves 'responsible' analysis, says Kerry Running and leaping through life at full speed 3 min Shields and Brooks on striking a deal with Iran, Planned Parenthood scrutiny 12 min Undercover Planned Parenthood video stokes abortion debate 4 min How studying insects may lead to smarter drones 8 min