Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/saturday-march-29-2014 Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Saturday on the News Hour... On Saturday's program, as Russian troops mass at the Ukrainian border, a leading expert weighs in on what NATO's Secretary General called a "concrete threat" to Ukraine. Later, in our signature segment, a closer look at the national debate on teacher tenure -- how one battle is playing out in a California courtroom. Listen to the Broadcast Subscribe to the Full Show Podcast Segments From This Episode Viewers respond to NewsHour’s report on Dutch pot policy Russian troop presence builds near Ukraine’s border South African opera singers’ lives documented in new film Can a lawsuit by nine students topple teacher tenure?