Drug cartels launch Mexico's 'Tet offensive'

Revenge is not a new current in Mexico's drug wars. Journalists who investigate too deeply are often killed, making Mexico one of the most dangerous places to report from. Prosecutors seeking justice often face the same fate. But suspected members of the La Familia cartel in the state of Michoacán gave new meaning to the word over the weekend–even in hardened Mexico–after gunmen shot up police stations across the country, killing five officers and two soldiers by the time the revenge attacks were over on Saturday. Mexican authorities say the series of assaults, among the most brazen since Mexican President Felipe Calderón launched an antidrug offensive in Mexico in December 2006, were a direct response to the arrest of one of their alleged leaders early Saturday.