ON November 7, Sarah Bettache received an unexpected phone call from her brother Ahmed, who told her he was on the Spanish island of Gran Canaria. Two days earlier, the 19-year-old had left his native Morocco on a rickety boat and embarked on a dangerous journey to reach the Canary Islands archipelago, around 100 km (60 miles) away. Like a record number of other migrants this year, he was seeking a better future in Europe. Bettache, who is 27 and lives in France where she has citizenship, had no warning of her brother's drastic action, and nor did the rest…