After a season-opening home loss to the Cowboys, the Giants were looking to win their first game of the season. Although Tampa Bay led the Giants 24-13 at halftime, the Giants rallied in the fourth quarter to score 25 points and win their first game, improving to a 1-1 home record and a 1-1 overall record. A mild controversy erupted on the Giants' final kneel in the closing seconds of the game when Tampa Bay head coach Greg Schiano ordered his defensive linemen to blitz Giants' quarterback Eli Manning, presumably in the hope that this would lead to a forced fumble and subsequent touchdown to steal the victory. However, this did not happen.
Question: How many points did Giants trail by halftime?
Answer: 11