There is an old Soviet-era Russian joke about two rival groups of archeologists who cannot agree on the age of a mummy discovered in Central Asia. At their wits' end, they call in the NKVD — the name of the dreaded KGB in Stalin's time — to settle the dispute.
The NKVD men, in their dark-gray suits, enter the cave where the mummy is being kept. They emerge early the next morning looking disheveled and exhausted.
"Well," ask the archeologists, "did you determine the mummy's age?"