Sales of craft beer have doubled in the last five years — and are expected to triple by 2017.  Here in Massachusetts, beer drinkers have a slew of locally brewed suds to choose from, but that wasn’t always the case.  Greater Boston delves into the local craft beer industry — from a look at its challenges to a talk with the minds behind Boston's newest brews.

http://video.wgbh.org/video/2336646339/