Days before next week’s 10th anniversary of the Newtown school massacre, the State Bond Commission on Thursday approved $10 million in the state’s competitive school security grant program for hardening buildings, purchasing cameras, electronic locks, ballistic glass and other measures. The commission’s last meeting of the calendar year lasted 43 minutes as members approved more than a billion dollars in new borrowing for a variety of statewide projects, about half of which are transportation-related, including $100 million for track and facility improvements at Hartford’s Union Station. The 55-item agenda was approved with no opposition to Lamont and his budget chief, Jeffrey Beckham, who review and approve items for inclusion in the monthly agenda. The Dixwell Plaza redevelopment in New Haven was allocated $10 million from the state’s Community Investment Fund for a new 150-unit, mixed use project expected to cost $200 million. Middletown was approved for $12 million to demolish and remediate a property in the first phase of the so-called Return to the Riverbend project along River Road near the Connecticut River.