Hundreds of people were on hand Saturday for the dedication of a new playground that will honor the memory of Martin Richard. Martin's Park, a ten million dollar fully-accessible city park named after the marathon bombing's youngest victim, is now open to the public. Living as one in Dorchester, that's the message behind the first annual unity peace festival at Ronan Park. Organized by Luisa Tavares Barros, the event seeks to bring people together to promote peace, celebrate Boston's neighborhoods and connect young people and families with programs that provide services to youth at risk. Interview with Nick Chiumenti, Federal Reserve Bank of Boston. Interview with Chris Dempsey, Transportation for Massachusetts.