• Advertising Age , Tuesday, April 16, 2013 9 AM

Employees from Boston-based agencies including Hill Holliday, Mullen, Arnold, Communispace and  Digitas participated in the Boston Marathon, and after the tragedy the agencies worked to  track them down and account for their safety. Diane Hessen, CEO of Communispace, tweeted that her team was safe. Digitas, which had five staffers running the race, confirmed they were unharmed. Foursquare CEO Dennis Crowley ran and live-tweeted.  Google set up its Person Finder page, a registry and message board that allows victims, family and friends to share information. Twitter's video-sharing tool, Vine, became a de facto news vehicle because of a six-second video snipped from a TV news report. The Boston Marathon and corporate sponsors such as Poland Spring and Sam Adams expressed shock and sympathy with the victims. 

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