Officials from across region attended launch in Mexico City
Funcionarios de la región asistieron el lanzamiento en México
Measure also defines family as a man and woman with children
Aldo Dávila a vocal critic of country's government
Ryan Fecteau and Aldo Dávila praised for leadership
Aldo Dávila a vocal critic of country's president, corruption
Vice president spoke with country's president on Monday
Bodyguard shot one of the assailants who approached vehicle
