**FILE** Peter Wendeborn, project manager for the United Nations rehabilitation plans, tour a mechanical room housing a 50-year-old air distribution system at the U.N. building in New York, in this May 13, 2005 file photo. A $1-billion, seven-year renovation of the aging United Nations headquarters will start this fall, according to Skanska AB, the Swedish construction company that said Friday, July 27, 2007 it had won the bid to manage the project. (AP Photo/Bebeto Matthews, file)