The governor of the state of Rio de Janeiro also highlighted the fact that London faced security problems , with a terrorist attack occurring just one day after it was awarded the 2012 Summer Olympics . The estimate was that 5,000 men of the National Public Security Force and 22,000 military officers ( 14,800 Army ; 5,900 Navy and 1,300 of the Brazilian Air Force ) , in addition to the fixed quota of Rio January , would act during the Olympic Games
terrorist attack
7 July 2005 London bombings
2016 Summer Olympics