US and South Korean special forces have been parachuting into North Korea to gather intelligence about underground military installations, a US officer has said in comments carried in US media. Army Brigadier General Neil Tolley, commander of US special forces in South Korea, told a conference held in Florida last week that Pyongyang had built thousands of tunnels since the Korean war, The Diplomat reported. "The entire tunnel infrastructure is hidden from our satellites," Tolley said, according to The Diplomat, a current affairs magazine. "So we send (South Korean) soldiers and US soldiers to the North to do special reconnaissance."...