An unknown number of British and other foreign gas workers have been killed in Algeria for no better reason than that they were Westerners who became targets for Muslim fanatics, and apparently ‘collateral damage’ in a rescue attempt. Al Qaeda, which has been in eclipse since the death of Osama Bin Laden almost two years ago, has won itself another bloody headline. And Algeria takes its place in a jigsaw of areas of extremist violence that extends across the globe. Statistically, a Western traveller or expatriate worker is far more likely to die in a motorway smash in the snow than to be murdered by Al Qaeda. But after every new attack, foreigners will continue to feel unsafe – whether they are on the north Kenya coast, in Egyptian resorts, or, now also, across large tracts of North Africa.