Kim Jong Un Might Be in Beijing. Here's What That Means for the U.S.

A phalanx of 23 police motorcycles greets a mysterious armored train, adorned with a distinctive yellow stripe, and shepherds its occupants in dark sedans through the smoggy streets of Beijing. Visitors are ushered away from nearby the city’s historic Tiananmen Square, and also from around Diaoyutai State Guesthouse, which has been frequented by North Korean officials. Someone very special had come to the Chinese capital Tuesday: rumors are that it is Kim Jong Un.