PULSE NEWS MEXICO Former Mexican President Luis Echeverría Álvarez, who served as the country’s head of state from 1970 to 1976, died on Friday, July 8, at home in his sleep, sources close to his family reported Saturday, July 9. Echeverría, who was a populist president from the centralist Institutional Revolutionary Party (PRI) turned 100 on Jan.17. On Nov. 14,