"President Bush and President Fox have met many times and have made the bilateral relationship a top priority, although disagreements over Iraq created some tension. In these meetings, the presidents agreed to enhance law enforcement and counter-narcotics cooperation between the two countries, and this cooperation was facilitated by the modification of the U.S. drug certification process. Top officials say that the countries have achieved unprecedented levels of cooperation, including the sharing of sensitive intelligence and expanded training for Mexican anti-drug forces. In the post 9/11/01 period, the countries have expanded cooperation into overlapping counter-narcotics and counter-terrorism programs. This report provides information on Mexico's counter-narcotics efforts during the first four years of the presidency of Vicente Fox. Special emphasis is placed on calendar year 2003, covered by the State Department's March 2004 report on international narcotics control, and the first six months of 2004, covered in President Fox's September 2004 ' State of the Nation' report. This report will be updated when warranted by events."