What gives us a google on request "Russian leaders go underground in preparation for world war 3" for August 25-28 2016:
Putin-led Russia building nuclear bunkers for war arsenal | World ...
www.express.co.uk › News › World 19 aug. 2016 y. - Russia building underground nuclear bunkers as it beefs up arsenal ready for war ..
Putin Prepares For Nuclear War - Russia Building Dozens Of Nuclear ...
allnewspipeline.com/Putin_Prepares_For_Nuclear_War.php
15 aug. 2016 y. - Russia has never stopped preparing for nuclear war. ..
Russia Preparing For Massive War By Building Dozens Of ...
beforeitsnews.com/global.../russia-preparing-for-massive-wa...
15 aug. 2016 y. - Russia is building large numbers of underground nuclear command bunkers ... “

That's all.
No pictures , no evidence , nothing. unproven information stuffing, focused on the British audience.