Content sources

 

http://www.astronautix.com

http://en.valka.cz

http://acecombat.wikia.com/

http://www.topedge.com/

http://brickmaniatoys.com

http://en.wikipedia.org/

http://www.fas.org

http://articles.janes.com/

http://warfare.ru/

http://www.stvgroup.cz

http://en.valka.cz/

 http://www.armorama.com/

http://www.bunkertours.co.uk

http://www.militarymodelling.com

http://www.f-a-p.nl

http://www.combataircraft.com

http://science.howstuffworks.com

http://www.radartutorial.eu

http://gizmodo.com