Federal Aviation Administration - United States Department of Transportation regulatory body for all things aviation and aircraft. Find Aircraft Handbooks & Manuals, Advisory Circulars (ACs), Regulations and Guidelines, Mechanic information including aircraft & technical information, safety advisories & alerts, licensure & certification, regulations & policy.
National Aeronautical and Space Administration: Beginner's Guide to Propulsion - What is propulsion? This guide provided by NASA covers the basics of propulsion and can be used to access NASA's website for more aeronautical information.
National Transportation Safety Board - The National Transportation Safety Board is an independent Federal agency charged by Congress with investigating every civil aviation accident in the United States and significant accidents in other modes of transportation – railroad, highway, marine and pipeline. The NTSB determines the probable cause of the accidents and issues safety recommendations to prevent future accidents.
USA.gov - Have a question about the USA? Learn where to find answers to the most requested facts about the United States of America. Find data about the U.S., such as demographic and economic data, population, and maps. Get information about the 2020 U.S. Census and learn how to respond. Find information for federal, state, and local government agencies and elected officials.