The volcanic ash cloud that grounded flights around the world for six days last month had a minimal impact on growth at Dubai International as April passenger numbers rose 13.9 per cent from 3,289,037 to 3,745,016 and cargo volumes increased 19.6% per cent from 149,169 tonnes to 178,357 tonnes versus the same period last year. The year to date passenger traffic increased 18.7 per cent to 15,215,536,...