The Bears remained a home for week four's Sunday night duel with the Philadelphia Eagles, led by Chicago native Donovan McNabb. In the first quarter, the Bears drew first blood as QB Kyle Orton completed a 19-yard TD pass to TE Greg Olsen.  The Eagles responded with McNabb completing a 22-yard TD pass to WR DeSean Jackson.  In the second quarter, Chicago responded with Orton completing a 23-yard TD pass to WR Marty Booker.  Philadelphia responded with RB Correll Buckhalter getting a 1-yard TD run.  The Bears closed out the half with Orton completing a 20-yard TD pass to WR/KR Devin Hester. In the third quarter, the Eagles drew closer as kicker David Akers got a 24-yard field goal.  In the fourth quarter, Philadelphia got even closer with Akers kicking a 31-yard field goal. Chicago answered with kicker Robbie Gould nailing a 41-yard field goal. The Eagles were able to mount an offensive drive in the fourth quarter, which put them only inches away from taking the lead with a touchdown. The Bears defense was able to prevent the Eagle's from entering the Eagles on four attempts with only a few minutes left. The Eagles were unable to score with less than minute left, allowing the Bears to walk away with a 24-20 victory. Q1 - CHI - 13:05 - 19 yd TD pass from Kyle Orton to Greg Olsen (Robbie Gould kick) (CHI 7-0) Q1 - PHI - 8:49 - 22 yd TD pass from Donovan McNabb to DeSean Jackson (David Akers kick (7-7) Q2 - CHI - 13:58 - 23 yd TD pass from Kyle Orton to Marty Booker (Gould kick) (CHI 14-7) Q2 - PHI - 11:40 - Correll Buckhalter 1 yd TD run (Akers kick) (14-14) Q2 - CHI - 1:16 - 20 yd TD pass from Kyle Orton to Devin Hester (Gould kick) (CHI 21-14) Q3 - PHI - 4:22 - David Akers 24 yd FG (CHI 21-17) Q4 - PHI - 13:21 - David Akers 31 yd FG (CHI 21-20) Q4 - CHI - 10:28 - Robbie Gould 41 yd FG (CHI 24-20)

Based on the above article, answer a question. How many field goals did Akers kick in the second half?
2