Riding 'The Beast' Across Mexico To The U.S. Border

Migrants arrive at a rest stop in Ixtepec, Mexico, after a 15-hour ride atop a freight train headed north toward the U.S. border on Aug. 4. Thousands of migrants ride atop the trains, known as <em>La Bestia,</em> or The Beast, during their long and perilous journey through Mexico to the U.S.