Vladimir Putin once again appeared to be unable to control a twitchy leg during his lengthy interview with US right-wing journalist Tucker Carlson earlier this week. The Russian president spent half an hour of the sit-down chat on an almost uninterrupted ramble covering 1,200 years of Eastern European history. But some viewers were distracted by his apparent need to physically push down his knee to prevent his leg from moving around. It’s been an odd habit of Putin’s for a while – stretching back at least as far as September 2022, when the appendage started twitching during a speech in...