In Mexico, the Mexican military is responsible for defending the independence, integrity, and sovereignty of Mexico, as well as providing for internal security, disaster response, humanitarian assistance, and socio-economic development; internal security duties are a key focus, particularly combating narcotics trafficking and organized crime groups, as well as border control and immigration enforcement; the constitution was amended in 2019 to grant the president the authority to use the armed forces to protect internal and national security, and courts have upheld the legality of the armed forces’ role in law enforcement activities in support of civilian authorities through 2028; the military also provides security for strategic facilities, such as oil production infrastructure, and administers most of the country's land and sea ports and customs services, plus a state-owned development bank; in addition, President LÓPEZ OBRADOR placed the military in charge of a growing number of infrastructure projects, such as building and operating a new airport for Mexico City and sections of a train line in the country’s southeast (2025)