SESAY: One of the series train from North Korea are pulled in to Beijing Monday, fueling speculation it was carrying Kim Jong-un.</s>VAUSE: There is no confirmation, but there is increased security around the official guesthouse where high-level foreign visitors usually stay. If the mystery man is the North Korean leader, it's likely his first international trip since taking power in 2011. Andrew Stevens joins us now from Beijing. So, Andrew, is this or is this not Kim Jong-un's train, the same train his father and grandfather used? The South Korean newspaper reports that Kim's train is armored and also contains conference rooms and audience chamber and bedrooms, satellite phone connections, and flat screen T.V.s. have been installed so that the North Korean leader can be briefed and issue orders. It's kind of like Air Force One but on tracks. It seems a train like that would be hard to hide.</s>ANDREW STEVENS, CNN INTERNATIONAL CORRESPONDENT: Yes. It goes slightly slower than Air Force One. 37 miles an hour was recorded speed of -- the average speed of that train. We don't know for a fact whether it is the same train, John, because pictures of the train when it rolled into Beijing have been taken down from social media. But there is an awful lot of speculations, and CNN is actually been talking to contacts with a deep knowledge of North Korea, and they say that there is a strong possibility that it is indeed Kim Jong-un. Security as you say very tight at the moment. Chang'an Avenue which is the main thorough fare in Beijing, between Tian'anmen Square and</s>VAUSE: If it is Kim Jong-un, he has some explaining to do because things haven't been good between Beijing and Pyongyang for a while. Andrew, good to see you. Thank you.</s>VAUSE: Yes. Got to put the train over here.</s>SESAY: Don't look over here. Quick break</s>VAUSE: OK.</s>SESAY: Surviving the Parkland School Shooting and inspiring millions with their activism, student Emma Gonzalez is being criticized for wearing a patch with a Cuban flag. We'll talk with another Parkland survivor about that, coming up
Convoy Fuels Speculation About Possible Kim Jong-un Visit To China