If elected, Mr. Thompson said he would increase the city police force by 2, 000 officers, flood high-crime areas with veterans instead of rookies and fix "stop and frisk, " a tactic in which officers can stop people whom they reasonably suspect of criminal behavior.

WSJ: Thompson Turns to Bratton

Mobile fingerprint scanners have helped a police force to identify more than 2, 200 people on the spot since August.

BBC: Birmingham & Black Country

In Britain ethnic minorities make up 6% of the population but only 2% of the police force and a little over 1% of the armed forces.

ECONOMIST: Race

Figures from February this year show the force employs 2, 217 police officers, 277 community support officers, 1, 720 police staff and 288 members of the Special Constabulary.

BBC: West Mercia Police headquarters

Today, with a string of agricultural colonies, processing plants, schools, hospitals and its own police force and prisons, the bingtuan has 2.5m members, or one-seventh of Xinjiang's population.

ECONOMIST: Go west, young Han

Manipur has a population of about 2.5 million people and a huge force of army, paramilitary and state police.

BBC: Irom Sharmila: India activist in 'suicide attempt' charge

The state has a population of about 2.5 million people and a huge force of army, paramilitary and state police.

BBC: Irom Sharmila Chanu with police officers

Lincolnshire's police commissioner is proposing a 2% increase in council tax to maintain policing numbers in the county's force.

BBC: Alan Hardwick