Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/saturday-april-19-2014 Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Saturday on the News Hour... On tonight’s program, Defense Secretary Chuck Hagel and his Polish counterpart agree to send U.S. ground troops to Poland. Later, a look at a promising new class of drugs called biologics. And we take a look at clinical trial being conducted in the U.K. for the treatment of advanced lung cancer. Listen to the Broadcast Subscribe to the Full Show Podcast Segments From This Episode New clinical trials underway for advanced lung cancer patients Pro-Russian militias continue to occupy buildings in eastern Ukraine What’s keeping less expensive biologic drugs from the U.S. market?