No. 8: Chihuahua, Mexico
Situated about 150 miles from Mexico's border with Texas, the Mexican city of Chihuahua is a key transit point for cocaine heading toward the United States and, as a result, an important battleground for cartels interested in controlling drug-shipment routes. Violence in Chihuahua has become increasingly unhinged, reaching an average of 83 homicides per 100,000 residents. On April 15, for example, about 10 men dressed in tactical gear -- complete with skull patches -- stormed a bar and opened fire, killing 15 and wounding two, including two journalists, Francisco Javier Moya, the former news director at a radio station in Ciudad Juárez, and Hector Javier Salinas Aguirre, the owner of a news website. Nearly 50 journalists have been killed in Mexico since President Felipe Calderón came to power in 2006, and cartels increasingly target journalists who dare to report on the drug war.
Above is a memorial in Chihuahua in 2006 to murdered women called Cruz de Clavos, or Cross of Nails.