Mexican war on drugs The Mexican government launches an investigation into former attorney general of Chihuahua César Jáuregui Robles for allowing U.S. Central Intelligence Agency agents to take part in an anti-drug trafficking operation in Chihuahua earlier this year. Under Mexican law, the federal government must approve the activities of foreign forces on Mexican soil. Authorities later arrest Jáuregui Robles and accuse him of treason. Sources: Al Jazeera Reuters