Sir David Amess was killed doing what he loved: speaking directly with voters. We examine the dangers inherent in the “constituency surgeries” that British politicians cherish. The fight against tuberculosis is made harder by mutations that confer drug resistance; we look at research that has traced nearly every one of them. And why Andy Warhol is big in Iran, again. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer   See acast.com/privacy for privacy and opt-out information.