The mayor of London recently said that terrorist attacks are “part and parcel of living in a big city” – and sadly, this might be true for the world these days. London, this week, St. Petersburg, Stockholm, next – big cities are falling victim to terrorism and innocent lives are becoming the target. Extremists strike at the most vulnerable parts of the city, and police do not seem to be able to stop them. Is there a cure for this malady? Can big city terrorism be defeated? And how do you stop a lone-wolf attacker when he has already set out on a mission? We ask a former London Metropolitan police officer, founding member of Scotland Yard’s undercover unit – Peter Bleksley.