At the White House on Friday, President Obama met with El Salvador's President Salvador Sanchez Ceren (from left), Guatemalan President Otto Perez Molina and Honduran President Juan Orlando Hernandez to discuss the border crisis. AP hide caption

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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 La Bestia, or The Beast, during their long and perilous journey through Mexico to the U.S. John Moore/Getty Images hide caption

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Salvador Sanchez Ceren, of the ruling Farabundo Marti National Liberation Front (FMLN), narrowly won the country's presidential election last week. Now he faces difficult challenges in a poor country that's been plagued by gang violence. Esteban Felix/AP hide caption

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The Chaparrastique volcano in eastern El Salvador erupted on Sunday. Hector Garay/Telenoticias 21/AFP/Getty Images hide caption

itoggle caption Hector Garay/Telenoticias 21/AFP/Getty Images