of the nation. she met this morning with mexico s first lady and then toured the national museum of anthropology. she also planned to visit a public elementary school late ther afternoon. the first lady will give a speech to high school and college students in the area. and mexico raised the estimated death toll. after more than three years of drug violence sweeping the country. at least 22,700 people. that s almost 5,000 more than they previously estimated. meanwhile, there s a significant development in mexico s drug war that authorities say is fueling bloody battles along the texas border. also, officials i should say say three mexican drug cartels have joined forces to destroy a gang of hitmen that has grown into a feared drug trafficking operation. joining me now former drug enforcement administration special agent robert strangbop. talk about this number. 22,000 people is staggering in three years.