LONDON – Emirates will be dropping its plans to operate flights between Dubai (DXB) and Mexico City (MEX).For the carrier’s Latin American strategy, this is a significant shift in its investment after officials expressed excitement over linking the two cities via a stop in Barcelona (BCN).The Fifth Freedom flights had originally been approved by the Spanish government, which would grant the Emirati carrier a Dubai-Barcelona-Mexico City link.Currently, Emirates flies to Chile, Brazil, and Argentina in Latin America. Mexico City would have been its fourth destination in this region of the . . .