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The Boston Globe

Metro

Green Line begins extension project

All stops to be finished by 2020

SOMERVILLE — Officials celebrated the start of construction on the Green Line Extension Tuesday in Somerville,  where Governor Deval Patrick said the project will be finished whether or not it ­receives federal funding.

“Growth requires investment,” Patrick said. “And invest­ing in education, innovation, and infrastructure, just like this project, is a strategy that works.”

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