I have my pilot's license and work at a medium-sized airport. The other day someone flew in on a soviet-built trainer called a Yak-52. Anyway I had to refuel him and got into a conversation about the plane. Apparently, the leaders of the military were afraid that student pilots might try to defect when they were allowed to fly by themselves for the first time (solo). So they had all the airplane design companies build their aircraft with very small fuel tanks, giving the aircraft a range of about 300 miles. They also did all their primary training east of the Ural Mountains around Siberia; that would insure that they were too far away to reach a western border.
Just thought that was interesting.
<span style=\'color:red\'>Remember, if you duck and cover, you'll be incinerated in a crappy pose</span> -The Anarchist Prince