[Tango Echo Dog]

Folks
I have often used the allaces.ru site recommended by another member to discover valuable information on Soviet Air Force (VVS, VMF, ADD, GVF) units.
But it appears that on the afternoon of April 28 (I had checked earlier in the day) this suddenly became a restricted access site. There is a sign-in introduction in Russian but I am not confident this might not be a scam and I don't know why the sudden change.
I thought I would alert other members who might be able to explain what happened. All I know is that it seems a very great shame.
Tango Echo Dog