Coming off of their road win over the Seahawks, the Saints went home for a Week 7 divisional duel with the Atlanta Falcons.  In the first quarter, New Orleans drew first blood as QB Drew Brees completed a 37-yard TD pass to WR Devery Henderson.  The Falcons would reply with former Saints kicker Morten Andersen getting a 38-yard field goal.  In the second quarter, Atlanta took lead with Andersen kicking a 33-yard field goal, along with QB Byron Leftwich completing a 9-yard TD pass to WR Roddy White. In the third quarter, New Orleans regained the lead with rookie RB Pierre Thomas getting a 24-yard TD run for the only score of the period.  In the fourth quarter, the Falcons tried to rally as Andersen kicked a 21-yard field goal.  Fortunately, the Saints sealed the win with Brees completing a 4-yard TD pass to RB Reggie Bush, with Bush getting the 2-point conversion on the ground.
Question: How many points were the Saints leading by at the end of the first quarter?
Answer: 4