After a huge win over the Bengals, the Steelers traveled down south to take on the Falcons.  In the first quarter, it was all Steelers as Shaun Suisham scored 2 38-yard field goals for 3-0 and 6-0 leads.  In the 2nd quarter, the Steelers would increase their lead when William Gay picked off Matt Ryan and returned the interception 51 yards for a TD for a 13-0 game.  The Falcons finally got on the board when Ryan found Devin Hester on a 17-yard TD pass to shorten the lead to 13-7.  Le'Veon Bell would wrap up the scoring before halftime with a 1-yard run for a 20-7 halftime lead.  In the 3rd quarter, it was all Falcons as Matt Bryant kicked 2 field goals:  from 28 and 22 yards out to shorten the lead to 20-10 then 20-13.  The Steelers however managed to pull away in the 4th quarter when Bell ran for a 13-yard TD for a 27-13 game.  The Falcons tried their hand at coming back when Ryan found Roddy White on a 4-yard TD pass for a 27-20 game.  With minutes left, the Steelers recovered the onside kick and moved down the field.  Ben Roethlisberger took knees to end the game with that final score. With the win, the Steelers improved to 9-5 and endured their first winning season since 2011. Ben Roethlisberger set a new Steelers franchise passing yardage record, surpassing his previous franchise record from 2009. He also became the sixth QB in NFL history to record a win against all other teams in the NFL. Le'Veon Bell also broke the Steelers franchise record of yards from scrimmage, breaking the mark held by Barry Foster. William Gay also set a new Steelers franchise record when he recorded his third interception return for a touchdown on the year.
Question: How many points ahead were the Steelers at halftime?
Answer: 13