http://www.profootballweekly.com/2012/1 ... -up-weak-o
• “Mike Nolan was known for running the 3-4 defense in Baltimore and before he was in Baltimore, he ran the over/under 4-3. He didn’t have that stout nose or the personnel to make it work in Atlanta so he switched to the wide “40” and lined (DEs Kroy) Biermann and (John) Abraham (and Ray Edwards) outside in a wide-seven (technique). If you look at their (defensive) tackles — (Jonathan) Babineaux, (Peria) Jerry and (Vance) Walker — none of them can play the nose. That is great coaching.”
Nolan is indeed an excellent coach, as he's done his best work masking the Falcons many flaws on defense.