How can cities protect their citizens against vehicle attacks?
(The Guardian World News)

It is impossible to make cities 100% safe from attacks with vehicles, but authorities can still do much to mitigate the threatSpain attacks - live updatesPolice hunt suspect - full storyCan you make a city safe against terrorists using vehicles as weapons? No, is the short answer, no more than you can against terrorists using other everyday items to execute attacks.But authorities can do much to mitigate the threat, at least to some obvious targets. With hindsight, officials will be regretting not moving faster to boost security measures on Las Ramblas boulevard, packed with tourists on a sunny August afternoon, after vehicle attacks elsewhere in Europe since last year. Continue reading...