BARGNY — In this fishing village some thirty kilometers south of Senegal’s capital city Dakar, the scene has become almost commonplace. On one October evening, a pirogue several meters long with over 140 passengers aboard set sail. A few minutes later, a second and then a third were launched. In all, almost 500 people set sail that night in an attempt to reach the Canary Islands inSpain illegally. A perilous journey of over 1,500 kilometers. Baye Diaune, a 38-year-old fisherman, was on one of these pirogues: “The sea was rough, so we had to turn back after four days,” he says, nervously chewin…