May Day saw around 3,000 'monstrators' out on the streets of Novosibirsk, the latest gathering of a trend that began in 2004.
Pensioner from the UK says medical staff among best in the world after he fell suddenly ill on dream trip across Russia with his wife.
New confessions mean his female victims now number 69, with at least a dozen more charges expected soon, taking his macabre toll to 81.
'Perfect husband and father' axed, stabbed or strangled full-figured women 'who resembled his mother'.
Located close to border region pivotal in war with Japan, experts say the pass was used to exchange intelligence.
Monika - real name Olga Pronina - had 140,000 social media followers fascinated by her love of speed, rule-breaking and glamour.
With membrane span of up to 1.5 metres the extinct animal could glide further than 50 metres.