Rescue workers are searching the debris in Mexico City, where an explosion Thursday rocked the headquarters of the state-owned oil company, Pemex. Yuri Cortez/AFP/Getty Images hide caption

itoggle caption Yuri Cortez/AFP/Getty Images

Infants used to be born at home to traditional midwives. Mónica Ortiz Uribe hide caption

itoggle caption Mónica Ortiz Uribe

Sept. 1, 2010: Police stood guard by a truck containing some of the bodies of immigrants killed by members of the Zetas drug cartel in Tamaulipas state. Jorge Dan/Xinhua /Landov hide caption

itoggle caption Jorge Dan/Xinhua /Landov

A worker separates tomatoes at a market in Mexico City. The Commerce Department says it might act to end a 16-year-old trade deal governing fresh Mexican tomatoes sold in the U.S. Gregory Bull/AP hide caption

itoggle caption Gregory Bull/AP

A city worker sells eggs as people line up outside the truck in Mexico City on Aug. 24. The Mexican government is battling an egg shortage that has caused prices to spike in a country with the highest per-capita egg consumption on Earth. Alexandre Meneghini/AP hide caption

itoggle caption Alexandre Meneghini/AP

On Thursday, the Mexican Navy presented Felix Beltran Leon (in red) as the son of Joaquin "El Chapo" Guzman, Jesus Alfredo Guzman Salazar. On Friday, Mexican and U.S. officials confirmed that Beltran's identity had been mistaken. Alfredo Estrella /AFP/Getty Images hide caption

itoggle caption Alfredo Estrella /AFP/Getty Images