María Elena Cervantes

When 9-year-old Abel assumes his absent father's role as man of the house, he garners his family's respect, and life resumes a comfortable rhythm -- until a man arrives at the house, claiming he's the long-lost patriarch

The Mexico City Metropolitan Train has many stories to tell: from archaeological findings during its construction, its underground museums and hospitals, and even its patents and special maintenance services. These are some of their stories.