Local policemen escort a detainee on suspicion of armed robbery outside the central command jail in Tijuana in this January 6, 2007 file photo. Drug violence along Mexico's border with California is escalating despite a military-backed assault on traffickers, raising doubts about President Felipe Calderon's war on drug cartels. At least 323 people have been executed in Baja California state so far in 2007, more than in all of 2006, even as Calderon sent more than 2,000 soldiers and federal police officers to try to crush the cartels at the start of the year.