yilmaz and his friends know they're lucky to be alive. holding area to register with port police. then board a bus to move north. few migrants intend to stay in greece. once the migrants and refugees have crossed the aegean sea to greece, they head to the border with macedonia, then into serbia, hungary, austria, and germany. >> thank you, thank you. >> from kos, the germany is more than 2,400 kilometers, around 1,500 miles. the massive numbers of refugees and migrants means there's safety numbers. but also, overwhelms local police, whose governments failed to prepare for this type of influx. in late august, macedonia closed its border with greece, creating a bottleneck, leaving thousands stuck under the rains with no shelter and no one to help them. when the border opened again, chaos. panic swells, the police launch smoke grenades. this woman got her son across, but she was pushed back. shock, dismay, despair that europe would be treating them like this. those who make it keep moveing north. at a train station in macedonia, we find 20-y

. >> so much uncertainty still lies aaide for mohammed, yilmaz, and hegger's families. they are the lucky ones. their journeys have ended. but so many others are in camps, train stations, bus stations, or trying to cross borders that are quickly closing. leaving them in limblimbo, with future at home or abroad. >>> hello, everyone. i'm poppy harlow in new york. this saturday afternoon, i want to welcome our viewers here in the united states and around the world as we await pope francis' arrival in cuba just one hour from now. >> and i'm chris cuomo live in havana's historic revolution square. the papal visit is making a lot of history. they're actually saying that revolution square could become evolution square in several ways. joining the cuban icons of martiz is a huge picture of jesus christ. that's a first here. there's a message underneath his visage that translates to "come to me." they say this is something that has not been in place in any way since the publishment of the square. so you have pope francis coming here, the third visit in 17 years. he'll be here. p