Illegal deforestation for avocado crops points to a blood-soaked trade with the United States involving threats, abductions and killings.
La obsesión de EE. UU. con el aguacate está acabando con los bosques mexicanos
La deforestación ilegal para cultivar el preciado fruto apunta a un comercio sangriento de exportación que involucra amenazas, secuestros y asesinatos.
Yes, I think it comes from the same rule. Estados Unidos is plural, so the abbreviation is doubled single letters. Sometimes English does this too (pp. for pages or §§ for sections). There are other examples in Spanish too.