MEXICO CITY (Reuters) - Mexico's President Andres Manuel Lopez Obrador took office in December, promising not to repeat the "failed policies" of past administrations that have done little to stem a tide of drug-related violence that cost some 29,000 lives last year.
But events in the states of Sinaloa, Michoacan and Guerrero this past week, including two mass killings and an all-out gun battle on Thursday that saw security forces overwhelmed by cartel gunmen, have raised questions about the effectiveness of his new security strategy.