Source: South China Morning PostThe North Korean missile tests conducted at the weekend were a sign of Pyongyang’s frustration over deepening US-South Korean defence ties, but were calculated not to provoke a backlash, according to diplomatic observers.Senior US administration officials said on Tuesday that Pyongyang fired short-range missiles off North Korea’s western coast on Sunday.They were initially described as ballistic weapons but that assessment was revised on Wednesday.“The North test-fired what were believed to be…Read More