article_snippet: Before the U.S.-bound trains appear on the horizon, the young men are seen relaxing and sleeping on the railway tracks of northern Mexico.
article_snippet: Rest: Before the U.S.-bound trains appear on the horizon, the young men are seen relaxing and sleeping on the railway tracks of northern Mexico.
article_snippet: Young Central American men are seen sitting on top of one of the U.S.-bound trains as it speeds through the Mexican countryside near Tabasco .
highlights_snippet: Young men are seen clinging on for dear life as the trains tear through the countryside of northern Mexico .
  