Coming off their divisional home win over the Redskins, the Giants flew to the Edward Jones Dome for a Week 2 duel with the St. Louis Rams.  In the first quarter, the G-Men drew first blood with QB Eli Manning completing a 33-yard TD pass to WR Plaxico Burress.  In the second quarter, the Rams responded with kicker Josh Brown getting a 54-yard field goal.  New York came right back with kicker John Carney nailing a 33-yard field goal.  St. Louis would answer with Brown kicking a 54-yard field goal, while Carney gave the Giants a 33-yard field goal. In the third quarter, New York increased its lead with Manning completing a 10-yard TD pass to WR Amani Toomer.  In the fourth quarter, the Rams tried to rally as QB Marc Bulger completed a 45-yard TD pass to WR Torry Holt.  Afterwards, the Big Blue pulled away with Manning's 18-yard TD pass to RB Ahmad Bradshaw, DE Justin Tuck's 41-yard interception return for a touchdown, and Bradshaw's 31-yard TD run. With the win, not only did the Giants improve to 2-0, but they also picked up their 12th consecutive road win.
Question: How many more touchdowns were scored in the second half than the first?
Answer: 4