Contractors camp out on roof Published July 8, 2011 By Master Sgt. Mark A. Winklosky 911 AW/PA PITTSBURGH IAP ARS -- Contractors replace leaking skylights on the roof of the 911th Airlift Wing's Avionics building, July 7. Tents were erected as a precautionary measure in the event of poor weather during construction. Estimated completion of the project is late August 2011.