at the Georgia Dome, Atlanta, Georgia Trying to end a three-game skid, the Falcons returned home for an NFC South rematch with the New Orleans Saints.  From the get-go, the Falcons trailed as in the first quarter, QB Drew Brees completed a 76-yard TD pass to WR Devery Henderson, while RB Deuce McAllister got a 1-yard TD run.  Atlanta would respond with kicker Morten Andersen kicking a 22-yard field goal.  In the second quarter, Andersen gave the Falcons a 30-yard field goal, yet New Orleans continued dominating with Brees completing an incredible 48-yard TD pass to WR Terrance Copper on the very last offensive play of the half.  In the third quarter, RB Warrick Dunn gave Atlanta some room to operate, as he a 1-yard TD run for the only score of the half.  However, in the fourth quarter, the Saints wrapped up the game with kicker John Carney getting a 25-yard field goal, while McAllister got a 9-yard TD run.  After the game, as QB Michael Vick was leaving the field, he flicked off an insulting fan with both hands.  He was fined $10,000 from the NFL and had to donate another $10,000 to charity.  With their fourth-straight loss, the Falcons fell to 5-6.
Question: How many points did Atlanta trail at the start of the second quarter?
Answer: 18