As Mauritania tightens its borders and Europe hardens its migration policies, departures from the country's shores may be falling. But for many migrants gathered in Nouadhibou, the forces pushing them to leave remain firmly in place.

As Mauritania tightens its borders and Europe hardens its migration policies, departures from the country's shores may be falling. But for many migrants gathered in Nouadhibou,…

NOUADHIBOU: From the Mauritanian coast, Ahmed, a Senegalese man, looks toward Europe, the place he dreams of being but fears he will never reach due to heightened security against…