Tension in the holy city of Jerusalem has been rising for weeks, amid the attempted eviction of Palestinians and a march by Jewish nationalists. Yesterday it erupted into the worst violence in years, as Hamas rockets fired at Israel from Gaza prompted retaliatory air strikes. A cyber-attack that shut down one of America’s largest fuel pipelines reflects the growing problem of ransomware. And in China, authorities are clamping down on a spurt of grave robbing. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer