Passenger

An Egyptian passenger sits on the locomotive of a train as it leaves Cairo train station in Egypt, Wednesday, Oct. 14, 2015.

Amr Nabil/AP

An Egyptian passenger sits on the locomotive part of a train as it leaves Cairo train station in Egypt, Wednesday

A passenger walks along the platform after missing a Barcelona bound high-speed train at the Atocha train station in Madrid, Thursday, Oct. 8, 2015. High-speed train service throughout the northeastern region of Catalonia bordering France was suspended for hours Thursday after thieves stole fiber-optic cable alongside the tracks that officials said was critical for maintaining train safety

Francisco Seco/AP

A passenger walks along the platform after missing a Barcelona bound high-speed train at the Atocha train station in Madrid. High-speed train service throughout the northeastern region of Catalonia bordering France was suspended for hours Thursday after thieves stole fiber-optic cable alongside the tracks

A child looks out from a train window be...A child looks out from a train window before leaving the Hefei railway station in Hefei, north China's Anhui province on July 1, 2013. China's summer travel peak starts on July 1, as railway systems serve an increasing number of passengers including students and tourists.

AFP

A child looks out from a train window before leaving Hefei railway station in Anhui, a province in north China. The peak summer travel period starts on Monday, with railway systems serving an increasing number of passengers including students and tourists