Stark new details have emerged of Vladimir Putin's poisoning laboratories where he hones toxic substances to kill his enemies. Experiments are conducted on humans in a sprawling network of secretive structures highlighting the evil underpinning his repressive rule. Investigative outlet Proekt revealed a staggering 3,500 people are employed on the Putin regime's poison programmes. Among the operations based on deadly toxins from this warped empire were the 2018 Novichok attack on ex-GRU spy Sergei Skripal and his daughter Yulia in the UK - and later poisoning of Putin political foe Alexei Navalny. At the network's centre is a little-known scientific...