Write a question about the following article: In a rematch of the opening game of the season, where the Houston Texans defeated the Indianapolis Colts 34-24, the Colts looked for revenge in their first Monday night game in Indianapolis since 2006.  Both defenses came out strong in the beginning with both teams punting on their first drives.  On the Colts second possession of the game, Indianapolis drove down the field for a Jacob Tamme touchdown, giving the Colts a 7-0 lead.  Going into the second quarter, the Indianapolis offense and defense proved too much for the Texans.  Kelvin Hayden took a 25-yard interception to the end zone and gave Indianapolis a 14-0 lead.  On the following drive, Houston went down into Colts territory, however was only able to score a field goal ending the Indianapolis shutout.  An Adam Vinatieri field goal gave the Colts a 17-3 lead going into halftime.  Houston came out of the locker room improved, however Peyton Manning and the Indianapolis offense continued to be productive scoring a touchdown on a Reggie Wayne reception in the beginning of the first half.  Following a Matt Schaub touchdown and another Vinatieri field goal, the Colts held a 27-10 lead going into the fourth quarter.  With the Houston offense looking improved and the Indianapolis defense struggling, the Texans were able to score a touchdown on an Arian Foster run, while the Colts scored another field goal.  With less than two minutes remaining in the game, a fumble by Schaub sealed the game with the final score being 30-17.  With the win, Indianapolis moved to 5-2 on the season and held sole possession of first place for the first time in the 2010 season.
How many points were the Texans trailing by at halftime?