The Attorney General of the United States, William Barr, and Timothy J. Shea, acting director of the Drug Enforcement Administration (DEA), announced this Thursday the result of an operation that dealt a "severe blow" to the main drug distribution centers of the Mexican cartels in US, with the arrest of 1,840 individuals and the seizure of more than 28,560 pounds (12,955 kilos) of methamphetamine.