Every passenger on the train is peering out the window, as the scene outside that used to be so familiar to them is changed after being away for four years. /CFP Photo

This is the first train that went through the western and eastern part of Aleppo since the rebellion blockout in 2012. /CFP Photo

The Battle of Aleppo was a major military confrontation in Aleppo between the government of Bashar al-Assad and Syrian opposition which includes various parties, in July 2012. It was also a part of the ongoing Syrian Civil war. /CFP Photo

The city was divided into two parts and the rebels controlled east Aleppo for the past four years. /CFP Photo

In December 2016, the Syrian government troops destroyed the rebels’ last supply line into Aleppo and achieved full control of the city. /CFP Photo

Syrian railway workers wait for a train to leave Aleppo's Jibreen station, on the city's eastern outskirts, for a one-hour round trip. /CFP Photo

Syrians sit in a train traveling through east Aleppo. /CFP Photo

A Syrian man peers out the window as he sits in a train traveling through east Aleppo. /CFP Photo

Syrian women take pictures as they ride a train that travels through Aleppo's devastated eastern districts. /CFP Photo