NEW YORK--(BUSINESS WIRE)--Fitch Ratings affirms the 'AA' rating on the Northern Group Housing, LLC, PA's taxable military housing revenue bonds, series 2013 (Air Force Northern Group Privatization Project) consisting of: --$208.8 million 2013 subseries A-1; --$12.7 million 2013 subseries A-2. The Rating Outlook is Stable. SECURITY The bonds are limited obligations of the project owner secured by a lien and security interest in the properties and improvements pursuant to the trust indenture, si