After a tough loss at home to the Lions, the Eagles traveled down south to New Orleans to take on the Saints in the Mercedes-Benz Superdome.  The Saints scored first with Patrick Robinson returning a Michael Vick interception 99 yards for a touchdown and a 7-0 lead for the only score of the game.  The Eagles got on the board in the 2nd quarter as Alex Henery kicked a 22-yard field goal to cut the lead to 7-3 not long before Chris Ivory ran for a 22-yard touchdown to move the Saints ahead by 11 with a 14-3 lead and then they would score again with Drew Brees finding Marques Coltson on a 1-yard touchdown pass for a 21-3 halftime lead.  The Eagles scored 10 unanswered points in the 3rd quarter with Vick hooking up with DeSean Jackson on a 77-yard touchdown pass for a score of 21-10 and then Henery kicked a 37-yard field goal for a score of 21-13.  But the Saints scored one last time as Brees found Jimmy Graham on a 6-yard touchdown pass for a 28-13 lead which would be the final score of the game as neither team scored in the 4th quarter.
How many yards longer was Alex Henery's second field goal compared to his first?
15