LONDON, UNITED KINGDOM - AUGUST 3: In this handout image supplied by the Metropolitan Police, members of the Met Police's elite counter-terror firearms unit are presented to the media as it is announced that 600 extra armed officers will be on patrol in the capital, on August 3, 2016 in London, England. The deployment comes in the wake of a succession of terrorist incidents in mainland Europe. (Photo by Metropolitan Police via Getty Images)
