Years after his father created a hit singing group of anthropomorphic rodents called The Chipmunks, Ross Bagdasarian Jr. made it his mission to revive his dad's beloved characters. Over the last 40 years, Ross Jr. and his wife Janice have built The Chipmunks into a billion dollar media franchise – run out of their home in Santa Barbara, California. PLUS for our postscript "How You Built That," we check back in with Alexander Van Dewark, who created a portable mat that helps people mix cement without a wheelbarrow or a paddle. (Original Broadcast Date: September 18, 2017.)
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How I Built This with Guy Raz