Two major tunnels in Boston have had wall panels weakened by corrosion in recent weeks. Published January 23, 2013 at 500 × 500 in Two major tunnels in Boston have had wall panels weakened by corrosion in recent weeks. ← Previous Next → Two major tunnels in Boston have had wall panels weakened by corrosion in recent weeks. Two major tunnels in Boston have had wall panels weakened by corrosion in recent weeks.