TIJUANA, MEXICO: MARCH 9, 2009: Man peeking through the fence towards the U.S. border in an effort to study border patrol movement and paths to cross in Tijuana, Mexico on the March 9, 2009. New fences are constantly being built making it more and more difficult to cross into the U.S. 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 immigration issues and Mexico's escalating war with drug cartels near the shared border.