North Korea is already believed to be capable of striking the US mainland with a nuclear weapon; now it claims that it can spy on enemy troops, after state media reported the regime’s first successful launch of a surveillance satellite, drawing an immediate response from South Korea. While Japan, South Korea and the US could not immediately confirm if the satellite’s payload had entered orbit late on Tuesday, a North Korean presence in space would add to military tensions on the peninsula and highlight the ineffectiveness of international sanctions. Hours after the North’s space agency claimed its Chollima-1 rocket had…