If you want the terrorists to win, refuse travelling. But there is only one response to the Barcelona attack, keep on travelling. Yesterday a concert of Allah-Las in Rotterdam was cancelled because of a terror warning. The lorry with gas cylinders was stopped and the driver arrested and interrogated. The warning came from Spain. by Earl of Cruise Las Ramblas, Barcelona - Photo by peresanz, courtsey Getty Images It is not possible to know what counts as being “too soon” when it comes to the idea of life returning to normal in the aftermath of any tragedy. Especially after a terror attack. In a troubled era when the “Breaking News” ticker begins flashing on your TV, phone or computer screen at any moment, and the information it brings may well be another shard of despair, it is difficult to say what constitutes day-to-day existence, or whether we can slip back into it when it has been ruptured by a bomb blast, a knife rampage, or a delivery va...