Underground airbase

I know that there was an older thread on this so I searched for it a few ways, and couldn't find it.

I came across this picture of an underground hangar for the PLAAF which is said to be hardened against nuclear blasts.




The site I found the picture on had some good comments posted about how one bomb at the entrance would make the planes unaccessible. The actual airstrip is outside so it would still be vulnerable to bombing.

Do other countries have underground airbases like this where the planes can be stored in a bunker?

thanks




[edit on 12-8-2005 by warpboost]