A Massachusetts State Police boat patrols the waters of the Charles River in front of MIT, safeguarding the barge housing thousands of explosive charges for Boston's 2007 Independence Day Fireworks Spectacular.

David M. Templeton—The Tech

A Massachusetts State Police boat patrols the waters of the Charles River in front of MIT, safeguarding the barge housing thousands of explosive charges for Boston's 2007 Independence Day Fireworks Spectacular. David M. Templeton—The Tech