Mexico City

Sex workers wear skeleton masks as they make an offering during a procession to remember their deceased colleagues in Mexico City...Sex workers wear skeleton masks, a traditional Mexican symbol representing the Day of the Dead, as they make an offering during a procession to remember their deceased colleagues, especially those who were violently murdered, in Mexico City October 27, 2014. The annual Day of the Dead is observed on November 1 and 2. REUTERS/Edgard Garrido (MEXICO - Tags: RELIGION SOCIETY)

Edgard Garrido/Reuters

Sex workers wear skeleton masks, a traditional Mexican symbol representing the Day of the Dead, as they make an offering during a procession to remember their deceased colleagues, especially those who were violently murdered, in Mexico City. The annual Day of the Dead is observed on November 1 and 2. 

U.S. President Obama delivers speech in Mexico City...U.S. President Barack Obama delivers a speech at the Anthropology Museum during his visit to Mexico City May 3, 2013.   REUTERS/Kevin Lamarque   (MEXICO - Tags: POLITICS)

Kevin Lamarque/Reuters

US President Barack Obama delivers a speech at the Anthropology Museum during his visit to Mexico City on Friday.