Mexico City

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Mexican President Andres Manuel Lopez Obrador gives a press conference in Mexico City, Wednesday, Jan. 9, 2019. Mexico’s new president issued an emotional appeal to his countrymen to help battle against fuel thefts, as long lines spread to gas stations in Mexico City. (AP Photo/Rebecca Blackwell)

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Central American migrants wait for subway cars as they resume their journey north after leaving the temporary shelter at the Jesus Martinez stadium, in Mexico City, Saturday, Nov. 10, 2018. Thousands of Central American migrants were back on the move toward the U.S. border Saturday, after dedicated Mexico City metro trains whisked them to the outskirts of the capital and drivers began offering rides north. (AP Photo/Rodrigo Abd)

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A motorcycle taxi driver pauses to look at marines blocking the area where a suspected drug gang leader and seven others were killed in a shootout in the Tlahuac district of Mexico City, Thursday, July 20, 2017. Mexico City residents were stunned by the sight of drug-war-style violence, including burnt-out vehicles and road blockades by gang-sympathizing motorcycle taxi drivers, in the nation's capital, sights that had previously been seen only in violence-wracked cities like Reynosa and Nuevo Laredo.(AP Photo/Rebecca Blackwell)

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A motorcycle taxi driver pauses to look at marines blocking the area where a suspected drug gang leader and seven others were killed in a shootout in the Tlahuac district of Mexico City, Thursday July 20, 2017. Mexico City residents were stunned by the sight of drug-war-style violence, including burnt-out vehicles and road blockades by gang-sympathizing motorcycle taxi drivers, in the nation's capital, sights that had previously been seen only in violence-wracked cities like Reynosa and Nuevo Laredo. (AP Photo/Rebecca Blackwell)

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Residents and motorcycle taxi drivers stop to look at marines blocking the area where a suspected drug gang leader and seven others were killed in a shootout in the Tlahuac district of Mexico City, Thursday, July 20, 2017. Mexico City residents were stunned by the sight of drug-war-style violence, including burnt-out vehicles and road blockades by gang-sympathizing motorcycle taxi drivers, in the nation's capital, sights that had previously been seen only in violence-wracked cities like Reynosa and Nuevo Laredo.(AP Photo/Rebecca Blackwell)

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In this July 13, 2017 photo, men remove mud from a shallow channel so that tourist boats will be able to move through the channel, in Xochimilco, Mexico City. Some of Mexico City’s most in-demand restaurants are increasingly incorporating produce grown at the famed aquatic gardens of Xochimilco (AP Photo/Marco Ugarte)

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In this July 13, 2017 photo, farmer Lucio Usobiaga, founding partner of Yolcan, points to a vegetable field as he talk to chefs and restaurant employees on a floating farm known as a "chinampa" in Xochimilco, Mexico City. Yolcan is a business that specializes in placing traditionally farmed Xochimilco produce in Mexico City’s most acclaimed restaurants. (AP Photo / Marco Ugarte)

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In this July 13, 2017 photo, a farmer takes advantage of a motorized boat to move faster along the channels of Xochimilco to his floating farm known as a "chinampa" in Mexico City. Xochimilco, on the far southern edge of Mexico City, has been a breadbasket for the Valley of Mexico since before the Aztec Empire, when farmers first created the “floating” islands bound to the shallow canal beds through layers of sediment and willow roots. (AP Photo/Marco Ugarte)

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In this July 13, 2017 photo, lettuce grows on a floating farm known as a "chinampa" in Xochimilco, Mexico City. Chinampa produce generally sells for 15 to 100 percent more than comparable goods at the enormous Central de Abasto, the go-to wholesale market for nearly all of Mexico City’s chefs that is so monolithic its competition sets prices across the country. (AP Photo / Marco Ugarte)

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In this July 13, 2017 photo, Ichiro Kitazawa, a chef at the Japanese restaurant Rocoi, inspects herbs on a floating garden known as a "chinampa" in Xochimilco in Mexico City. Chinampa produce generally sells for 15 to 100 percent more than comparable goods at the enormous Central de Abasto, the go-to wholesale market for nearly all of Mexico City’s chefs that is so monolithic its competition sets prices across the country. (AP Photo/Marco Ugarte)

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In this July 13, 2017 photo, men remove mud from a shallow channel so that tourist boats will be able to move through the channel, in Xochimilco, Mexico City. Some of Mexico City’s most in-demand restaurants are increasingly incorporating produce grown at the famed aquatic gardens of Xochimilco (AP Photo/Marco Ugarte)

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In this June 27, 2017 photo, Honduran refugee Laura Maria Cruz Martinez sits in a display chair as she waits for customers at the medical supplies store where she works in Mexico City. About five months after first applying for refugee status at Mexico's southern border, Martinez's family moved to Mexico City with the help of the United Nations refugee commission and Cruz found a job as a store clerk near downtown. (AP Photo/Rebecca Blackwell)

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United States coach Bruce Arena gives instructions to his players as Mexico's Carlos Vela, 11, celebrates with teammates after scoring his team's first goal against the U.S. during their World Cup soccer qualifying match at Azteca Stadium in Mexico City, Sunday, June 11, 2017.(AP Photo/Rebecca Blackwell)

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United States coach Bruce Arena gives instructions to his players as Mexico's celebrate after scoring their first goal during their World Cup soccer qualifying match at Azteca Stadium in Mexico City, Sunday, June 11, 2017.(AP Photo/Rebecca Blackwell)

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United States coach Bruce Arena looks on during a World Cup soccer qualifying match between the U.S. and Mexico at the Azteca Stadium in Mexico City, Sunday, June 11, 2017.(AP Photo/Rebecca Blackwell)

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Mexico's Carlos Vela, left, celebrates with teammate Mexico's Hirving Lozano after scoring his team's first goal against the U.S. during their World Cup soccer qualifying match at Azteca Stadium in Mexico City, Sunday, June 11, 2017.(AP Photo/Rebecca Blackwell)