Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/pbs-newshour-weekend-full-episode-jan-30-2016 Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Saturday on the NewsHour... Saturday on NewsHour Weekend: Presidential candidates buckle down in the final weekend of campaigning in Iowa before Monday's caucuses, concern is growing over the Zika virus as new cases are reported, and in our signature segment, West Point cadets are using social media to fight Islamic State propaganda. Alison Stewart anchors from New York. Listen to the Broadcast Subscribe to the Full Show Podcast Segments From This Episode Scientists open ‘black box’ of schizophrenia by discovering potential genetic cause 4 min Recruiting college students to fight extremists online 9 min Battle for Iowa: Candidates close in on first voters of 2016 race 5 min Spike in earthquakes rattles Oklahoma oil & gas industry 11 min