Ah Albanian mason who has been living in Italy since the 90s told me a story about bunkers. I cannot date it to a year nor assess its truth but here it is.

A Minister (maybe Defense? Army? whatever) went to check the new bunkers. They looked good but he asked to the chief engineer how he could be sure that Hoxha would be satisfied with them.

"You know, if he thinks they are not good I'm dead."

"They are very good."

"So you must get in. We will shell the bunker and check if it's really as good as you say."

The engineer was not happy with that but the choice was between getting in or die immediately. He got in and they shelled the bunker all day long. The bunker survived, the engineer eventually recovered from the experience (temporary deafness and other problems) and the Minister could bet his own life on those bunkers.