TIJUANA, MEXICO: MARCH 8, 2009: Mexican police search downtown area for small time drug users and detain them, as part of a weekly offense against the larger Mexican drug war in Tijuana, Mexico on March 8, 2009. Tijuana is one of the major battlegrounds of the cartels in the ongoing Mexico Drug War, which has taken the lives of over 7,000 people since the beginning of 2007. The Obama administration is challenged to address Mexico's escalating war with drug cartels near the shared border.