50 minutes agoBy Jake Horton, Yi Ma, Daniele Palumbo, BBC VerifyBBCNorth Korea is building sections of what appears to be a wall in several places near its border with South Korea, new satellite images reveal.Images analysed by BBC Verify also show that land inside the Demilitarised Zone (DMZ) has been cleared, which experts say could be a violation of the long-standing truce with South Korea.The DMZ is a 4km (2.5 miles) wide buffer zone between North and South Korea, who are still technically at war having never signed a peace treaty. The DMZ is split in two, with each side controlled…