Decoding Netanyahu's Red Line

When Israeli Prime Minister Benjamin Netanyahu drew a bright red line across a drawing of a bomb representing Iran’s nuclear program at the U.N. General Assembly, he used an expression that has bled into newspaper headlines around the world. Red line. VOA’s Kate Woodsome explores the origins of the phrase. (Web version available: http://www.voanews.com/content/iran-us-red-line/1516878.html)