U.S. Border Patrol agents, left, speak with two Central American migrants as they sit atop the border structure separating Mexico and the United States in Tijuana, Mexico.

Migrants traveling with a caravan hoping to reach the U.S. border, wait in line to board buses in La Concha, Mexico. Buses and trucks are carrying some migrants into the state of S...

Central American migrants moving as a caravan to the U.S. border get a free ride on a truck past maguey farms as they depart Guadalajara, Mexico. Many say they are fleeing rampant ...

A woman in makeup with an iguana walks during a Zombie Walk in Mexico City.

A man in makeup poses for a pictures during a Zombie Walk in Mexico City.

A woman in makeup poses for a pictures before a Zombie Walk in Mexico City.

A woman in makeup poses for a picture during a Zombie Walk in Mexico City. Hundreds dressed in rags and ghoulish makeup to look bloody and decaying, gathered in the historic center...

A Central American migrant, part of the caravan hoping to reach the U.S. border, arrives at the Benito Juarez Auditorium that is being as a migrant shelter, in Guadalajara, Mexico....

Central American migrants, part of the caravan hoping to reach the U.S. border, get a ride on a truck carrying coffins, in Irapuato, Mexico.

Central American migrants, part of the caravan hoping to reach the U.S. border, get a ride on a truck carrying rolls of steel rebar, in Irapuato, Mexico.

Central American migrants, part of the caravan hoping to reach the U.S. border, get a ride in a chicken truck, in Irapuato, Mexico.

Central American migrants, part of the caravan hoping to reach the U.S. border, mob trucks hoping to get a ride North, in Irapuato, Mexico. Several thousand Central American migran...

Central American migrants, part of the caravan hoping to reach the U.S. border, get a ride on a truck, in Celaya, Mexico. Local Mexican officials were once again helping thousands ...

Thousands of people swing their hand lanterns during the ecumenical festival Martini (Day of Martin) in honour of the Catholic St. Martin and of Martin Luther, the Protestant refor...

A woman puts some colored powder on her dog during Mexican "Kukur Tihar" event in Mexico City.

People play with their dogs during Mexican "Kukur Tihar" event in Mexico City. Kukur Tihar is a Hindu festival in honor of the dogs.

A Central American migrant, carrying a representation of the Honduran national flag, arrives in Queretaro, Mexico. Thousands of Central American migrants were back on the move towa...

A Central American migrant bypasses a subway turnstile after leaving the temporary shelter at the Jesus Martinez stadium, in Mexico City.

Central American migrants ride on the subway after leaving the temporary shelter at the Jesus Martinez stadium, in Mexico City. About 500 Central American migrants headed out of Me...

Colombian singer Toto la Momposina performs during the Fenix Iberoamerican Film Awards at the Esperanza Iris Theater in Mexico City.