North American Aerospace Defense Command (NORAD), is a combined organization of the United States and Canada that provides aerospace warning, air sovereignty, and protection for Northern America. Headquarters for NORAD and the NORAD/United States Northern Command (USNORTHCOM) center are located at Peterson Air Force Base in El Paso County, near Colorado Springs, Colorado. The NORAD and USNORTHCOM Command Center at Peterson AFB serves as a central collection and coordination facility for a worldwide system of sensors designed to provide the commander and the leadership of Canada and the U.S. with an accurate picture of any aerospace or maritime threat. Blair & Remy provided optional schemes that were consolidated into one scheme during a week-long charrette. The scheme was approved by the NORAD user and the Base Commander during the outbrief.