St. Louis Start-Up Helps Secure Boston MarathonSirenGPS to provide text communication for volunteers and aid stations.
Charlie Brennan - Tuesday, February 11th -- Entrepreneur Paul Rauner, Founder and CEO of Siren/GPSCharlie talks with Paul Rauner,founder and CEO of Siren/GPS, in Charlie's 41st in a series on growing innovative entrepreneurism in the STL region.

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