anti-terrorism

Armed police prepare to deploy from Hyde Park, central London, as Scotland Yard announced that the first of 600 additional armed officers were trained and operationally ready

Stefan Rousseau/PA Wire

Armed police prepare to deploy from Hyde Park, central London, as Scotland Yard announced that the first of 600 additional armed officers were trained and operationally ready

A police officer runs over a rooftop during a police anti-terrorist operation on the site of a shooting in the rue du Dries in Forest-Vorst, Brussels, Belgium

Laurent Dubrule/epa

A police officer runs over a rooftop during a police anti-terrorist operation at the site of a shooting in the rue du Dries in Forest-Vorst, Brussels, Belgium

French Research and Intervention Brigades (BRI - Brigade de recherche et d'intervention) policemen officers take part in a training exercice at the Bibliotheque Nationale de France in Paris.

Dominique Faget/AFP/Getty Images

French Search and Intervention Brigades (BRI – Brigade de recherche et d’intervention) policemen officers take part in a training exercice at the Bibliotheque Nationale de France in Paris.

A South Korean police SWAT team members move into a building during an anti-terror drill in Seoul.

  © Jung Yeon-Je/AFP/Getty Images

A South Korean police SWAT team moves towards a building during an anti-terror drill in Seoul.

South Korean special police officers descend the stairs from subway station during an anti-terror exercise as part of Ulchi Freedom Guardian or UFG in Seoul, South Korea.

Lee Jin-man/AP

South Korean special police officers enter a subway station in Seoul, South Korea, during an anti-terror exercise as part of Ulchi Freedom Guardian, an annual joint military operation between South Korea and the US

Iraqi anti-terrorism special forces stand at attention before a simulated hijacking of a plane, during a training exercise in Baghdad airport, Iraq, on Wednesday.

Hadi Mizban/AP

Iraqi anti-terrorism special forces stand to attention before a simulated hijacking of an aeroplane during a training exercise at Baghdad airport, Iraq

People walk past a South Korean soldier participating in an anti-biochemical terrorism drill in central Seoul

Lee Jae-Won/Reuters

A member of the military forces in South Korea takes part in training on how to deal with a possible biochemical terrorist attack in Seoul, the country’s capital city, undisturbed by members of the public casually walking by