Brazil has spent £498m on security for the 2014 World Cup – more than five times the amount South Africa spent on security for the last World Cup. Over 170,000 security officers will be available to patrol the 12 stadiums hosting World Cup. Helicopters, drones, and surveillance equipment will also be used.

The Brazilian government is promising that "the World Cup in Brazil will be the safest ever" despite continuing protests.

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A member of the Brazilian army goes through a decontamination procedure during a simulated chemical and radiological attack exercise at the Mane Garrincha National Stadium in BrasiliaReuters
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A Brazilian army officer wearing a gas mask takes part in a simulated chemical and radiological attack exercise at the Mane Garrincha National Stadium in BrasiliaReuters
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Paramilitary police personnel wearing protective suits decontaminate 'victims' during a drill to deal with a chemical weapon attack in Sao PauloAFP
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A boy wrapped in Brazilian national flag stands in front of policemen during a protest by metro workers in Sao PauloReuters
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Civil defence personnel help a 'victim' of a simulated explosion of a radioactive device in a subway car at Cidade Nova subway station in Rio de JaneiroAFP
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England's Steven Gerrard walks past Brazilian army personnel as he arrives at the team hotel in Rio de JaneiroReuters
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Security personnel shelter from the sun in the shadow of the stadium wall as they watch the Netherlands team training session at the Estadio Jose Bastos Padilha Gavea in Rio de JaneiroGetty
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Police officers patrol a football field atop the Arvore Seca favela in the Lins slum complex in Rio de JaneiroReuters
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A policeman observes a screen displaying the Maracana stadium at the security centre for the 2014 World Cup in Rio de JaneiroReuters
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A sniper aims his rifle towards Rocinha slum in Rio de JaneiroReuters
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The Brazilian Navy carries out an anti-terrorist drill in Rio de Janeiro as part of the security measures for the World CupAFP
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Police officers wearing riot gear attend a presentation of security equipment at Flamengo beach in Rio de JaneiroAFP
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Riot police practise crowd control during a training session with FBI agents in Rio de JaneiroReuters
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A young boy gives a thumbs-up as police patrol near the Antonio Carlos Magalhaes municipal stadium in Porto SeguroAFP
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Riot police patrol the Santinho beach in Florianopolis, Santa Catarina stateReuters
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Members of the Brazilian Army, Navy and Air Force attend a presentation of security equipment that will be used during the 2014 World CupReuters
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A volunteer is decontaminated during a simulated chemical attack outside Mane Garrincha National Stadium in BrasiliaAFP
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Members of the Brazilian armed forces on horseback salute during a presentation of security equipment that will be used during the 2014 World Cup in BrasiliaReuters
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Police use tear gas to impede indigenous Brazilians from marching towards the Mane Garrincha stadium in BrasiliaReuters
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Police officers from several countries participate in the inauguration of the Centre for International Police Cooperation in BrasiliaReuters
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Brazilian Army soldiers take part in a simulated explosion of a radioactive device at Mane Garrincha National Stadium in BrasiliaAFP