PRI's The World: 02/17/2016

Today's "Tehran Stories" include a profile of an Iranian start-up that's caught the eye of Groupon in Silicon Valley. We also introduce you to an Iranian band whose lively electric style of music was banned by Iranian religious authorities — but has since won them over. Also, do you know how many hats and gloves are left on London's Underground train system every year? The World's Leo Hornak pays them a visit to find out.