Coming off their win over the Ravens, the Steelers went home for a Week 14 AFC North rematch with the Cincinnati Bengals.  Pittsburgh trailed early in the first quarter as Bengals quarterback Carson Palmer completed a 1-yard touchdown pass to offensive tackle Andrew Whitworth.  The Steelers took the lead in the second quarter with safety Troy Polamalu returning an interception 45&#160;yards for a touchdown, followed by a 23-yard field goal from kicker Shaun Suisham. Pittsburgh increased their lead in the third quarter with Suisham's 35-yard field goal.  Afterwards, the Steelers pulled away in the fourth quarter with linebacker LaMarr Woodley returning an interception 14&#160;yards for a touchdown, followed by Suisham booting a 41-yard field goal.
How many defensive touchdowns did the Steelers score?
2