National Transportation Safety Board

http://en.wikipedia.org/wiki/NTSB

Federal Aviation Administration

http://en.wikipedia.org/wiki/FAA

European Organisation for the Safety of Air Navigation

http://en.wikipedia.org/wiki/EUROCONTROL

International Civil Aviation Organization

http://en.wikipedia.org/wiki/International_Civil_Aviation_Organization

European Aviation Safety Agency

http://en.wikipedia.org/wiki/European_Aviation_Safety_Agency

European Civil Aviation Conference

http://en.wikipedia.org/wiki/European_Civil_Aviation_Conference