In Kunduz, a new unit has begun patrolling in Imam Sahib.
The C.I.A. has begun patrolling the skies above Yemen with armed drones, although they are not believed to have yet carried out any strikes.
A European Union flotilla has begun patrolling the gulf in recent days, joining naval ships from India, the United States, Iran and Russia.
Iraqi soldiers have begun patrolling Haifa Street, one of the most violent in Baghdad.
Police officers have begun patrolling select subway stations on electric scooters, and visibility is their main selling point.
Ships from five European nations have begun patrolling the Mediterranean in an attempt to control the growing numbers of foreign immigrants trying to enter Europe illegally.
Self-defense committees with dozens of members have begun patrolling some neighborhoods, in part to maintain order with the withdrawal of security forces and in part to prepare for a government attempt to retake the city by force, they said.
A spokesman for the United Nations force said that peacekeepers from Guyana, part of the earlier United Nations presence, had begun patrolling in the central and western sectors of southern Lebanon, while Indian peacekeepers were patrolling in the southeast.
Brazilian troops have begun patrolling Olympic venues in an attempt to reassure athletes and visitors about a public security situation that even the Rio de Janeiro mayor has described as "horrible, terrible".
What's more, in some areas these teachers have linked up with local bands of unofficial "community police", who have begun patrolling Guerrero's badlands with bandanas and blunderbusses, keeping order (or, some say, disrupting it) in a part of Mexico where the authorities' grip is weak.
Now, in an effort to protect visitors streaming into Acapulco for spring break, security measures have been reinforced and 200 federal police have begun patrolling the hotel zone, including by helicopter, and setting up road blocks in order to search cars and passengers for weapons and drugs.
