The ship "Cuauhtemoc" of the Mexican Navy arrives at the port of Havana, in Havana, Cuba, on Sept. 8, 2018. According to the local press, the "Cuauhtemoc" made a friendly visit on Saturday to the Cuban capital. (Xinhua/Joaquin Hernandez)

People watch the ship "Cuauhtemoc" of the Mexican Navy upon its arrival at the port of Havana, in Havana, Cuba, on Sept. 8, 2018. According to the local press, the "Cuauhtemoc" made a friendly visit on Saturday to the Cuban capital. (Xinhua/Joaquin Hernandez)