Thanks to the following sources for helping us out with our project.

Heli History: http://165.29.91.7/classes/humanities/amstud/97-98/helicptr/webpage.htm

Modern Helis: http://www.sikorsky.com/sac/Home/0,3170,CLI1_DIV69_ETI541,00.html

http://www.bellhelicopter.textron.com/en/aircraft/commercial/

http://216.19.207.5/default.asp

Plane History: http://www.messybeast.com/history/aero-history1.htm

Modern Planes: http://www.aerospaceweb.org/aircraft/jetliner/

Pioneers of history: http://www.flyingmachines.org/

Airships: U.S. Navy, Wikipedia Online Encyclopedia, and NASA.

All World War 2: http://www.world-war-2-planes.com/

Post World War 2: http://www.jetplanes.co.uk/f117.html

All charts and some images are also from.

http://www.wikipedia.org/

Planes Join the War:

Taylor, John, and Kenneth Munson. History of Aviation. NewYork: Crown, 1977.