After a huge win on the road, the Steelers returned home for a game against the Buccaneers.  The Bucs scored first when Mike Glennon found Mike Evans on a 7-yard TD pass for a 7-0 lead.  They increased their lead when Patrick Murray kicked a 50-yard field goal for a 10-lead.  The Steelers finally got on the board when Shaun Suisham nailed a 25-yard field goal to come within a TD, 10-3 followed by Ben Roethlisberger hooking up with Antonio Brown on an 11-yard TD pass to tie the game up at 10-10.  In the 2nd quarter, Roethlisberger found Brown again this time on a 27-yard TD pass to take the lead 17-10 at halftime.  After the break, Doug Martin ran for a TD from 3 yards out to tie the game back up, 17-17.  The Steelers pulled away as Roethlisberger found Heath Miller on a 5-yard TD pass for a 24-17 lead.  In the 4th quarter, the Bucs pulled within 4 when Murray kicked a 27-yard field goal for a 24-20 game.  Driving down the field, the Bucs were able to complete the comeback attempt as Glennon found Vincent Jackson on a 5-yard TD pass for a final score of 27-24.
Question: How many points were the Steelers winning by at halftime?
Answer: 7