Air and Space Basic Course (ASBC) was a Professional Military Education (PME) course taught by the Squadron Officer College, Air University, at Maxwell AFB, AL. From 1997 to mid-2011, it was the first level of PME for U.S. Air Force second lieutenants and was required regardless of commissioning source. Together, ABSC and Squadron Officer School comprised the Air Force's Basic Developmental Education (BDE) program. Each ASBC class had approximately 12 students and was taught by an Air Force Captain.