Heavily armed Guatemalan troops and military police deployed to the country's capital Tuesday, challenging street gangs blamed for killing 11 officers and sparking a major security crisis. 

President Bernardo Arevala ordered the "Plan Sentinel" operation to break the stranglehold of Barrio 18 and MS‑13 gangs on urban areas. 

Originally published on doc.afp.com, part of the BLOX Digital Content Exchange.