Eyder Peralta

Firefighters belonging to the Tacubaya sector and workers dig for survivors after an explosion at a building adjacent to the executive tower of Mexico's state-owned oil company PEMEX. Guillermo Gutierrez/AP hide caption

toggle caption
Guillermo Gutierrez/AP

Mourners create a memorial at the fountain of the Aurora Municipal Center after a prayer vigil Sunday for the 12 victims of Friday's mass shooting at the Century 16 movie theater. Kevork Djansezian/Getty Images hide caption

toggle caption
Kevork Djansezian/Getty Images