Brussels lockdown: What response to terror attacks?
The Belgian capital has been under lockdown since Saturday, with a terror threat shutting schools and public transportation. Seen from Paris, the lockdown can feel like a taste of things to come. As the British Prime Minister visits the French capital, we're all wondering if a semi-permanent state of alert is the new normal. Do world leaders have the means to keep up the deployment? Are we doing too little or too much?