After this, U.S. citizens should avoid Mexico - way to dangerous to go even with a tour group. And keep the Mexican riffraff from sneaking into the U.S.
http://travel.state.gov/travel/cis_pa_tw/tw/tw_5815.html
Mexico
November 20, 2012
The Department of State has issued this Travel Warning to inform U.S. citizens about the security situation in Mexico. General information on the overall security situation is provided immediately below. For information on security conditions in specific regions of Mexico, which can vary, travelers should reference the state-by-state assessments further below.
This Travel Warning supersedes the Travel Warning for Mexico dated February 8, 2012 to consolidate and update information about the security situation and to advise the public of additional restrictions on the travel of U.S. government (USG) personnel.
According to the statistics last published by the Mexican government in late 2011, 47,515 people were killed in narcotics-related violence in Mexico between December 1, 2006 and September 30, 2011, with 12,903 narcotics-related homicides in the first nine months of 2011 alone. While most of those killed in narcotics-related violence have been members of TCOs, innocent persons have also been killed.
The number of U.S. citizens reported to the Department of State as murdered under all circumstances in Mexico was 113 in 2011 and 32 in the first six months of 2012.