Want to clear some things for myself...
A lot of NATO helicopters crashed in Afghan in past few years. Everytime official report is the same - 'we investigate..bla bla.. will find the answer.. it was technical problem'. I understand, that temperature in winter is below -20, but in summer over 40... So that aircrafts are not suitable for changeable climate or what?
![Image](http://www.nation.com.pk/digital_images/480/2011-06-05/helicopter-crash-kills-2-nato-service-1324298933.jpg)
![Image](http://2.bp.blogspot.com/-pI0uxDfND5o/TbKyaAycegI/AAAAAAAABt4/cN4ByjnLVh4/s400/NATO-helicopter-crash.jpg)