Government Sites

FAA Certification of aircraft and pilots, security of airports and operation of the U.S. air traffic control system
FAA Federal Aviation Regulations Federal Aviation Regulations
FAA Regulatory Support Division Airworthiness Programs, Aviation Data Systems, Airman Testing Standards, Designee Standardization, Automation Infrastructure Management
NASA Aeronautics and Space Research
NOAA Scientific information on global environment
NTSB Investigates and reports on civil aviation accidents