A trove of leaked documents has revealed the depth of America's spying apparatus around the world, detailing how the US continues to infiltrate allied nations amid heightening global tensions. The documents, which provided the clearest picture yet of the Kremlin's depleted military capacity, were telling as to the extent to which US espionage tactics have effectively penetrated Vladimir Putin's war machine. However, the intelligence breach, which included reports from late February to early March but have only been leaked online in recent days, also unearthed probes in a variety of nations, including South Korea, Iran and the UK, per the...