After a tough loss to the Jets, the Steelers traveledto LP Field to take on the Titans.  In the first quarter, the Steelers scored first when Shaun Suisham kicked a 49-yard field goal for a 3-0 lead.  They increased their lead as William Gay picked off Zach Mettenberger and returned it 28 yards for a TD for a 10-0 lead.  The Titans finally got on the board when Bishop Sankey ran for a 9-yard TD for a 10-7 game.  However, the Steelers pulled away as Suisham kicked another field goal from 23 yards out for a 13-7 lead.  In the 2nd quarter, it was all Titans when Ryan Succop kicked a 20-yard field goal to come within 3, 13-10.  They eventually took the lead when Mettenberger found Nate Washington on an 80-yard TD pass and led the game 17-13 at halftime.  After the break, the Titans went back to work in the 3rd quarter with Mettenberger finding Chase Coffman on a 4-yard TD pass for a 24-13.  In the 4th quarter, the Steelers staged a comeback when Le'Veon Bell ran for a 5-yard TD to come within 4, 24-20.  Then Roethlisberger found Antonio Brown on a 12-yard TD pass later on in the quarter to retake the lead 27-24.  The defense was able to hold off the Titans offense and recovered the onside kick with less than 2 minutes remaining, sending the Steelers to 7-4 going into their bye week. Le'Veon Bell ran for 204 yards, an NFL high for a single game so far in 2014. It was also the best game by a Steelers running back since 2010. This was the Steelers' only game outside of the Eastern Time Zone time zone during the 2014 season.. How many touchdown passes were thrown during the first half?