The North Korean capital has been placed under lockdown, according to sources with Pyongyang, raising new questions about the stability of Kim Jong-un's regime. Quoting sources within North Korea, the respected New Focus International news web site has reported that a ban on new travel passes to leave or enter Pyongyang was introduced on September 27. And while the North Korean authorities have in the past limited access to the capital, the latest restrictions even apply to permanent residents of Pyongyang, who are by definition the elite of the regime. "This sort of action suggests there has either been an...