Her other options were being snuffed out. Kenyan authorities were trying to close Dadaab, which for a quarter-century had sheltered the victims of Somalia's endless war and hunger crises. In the United States, which had resettled more than 100,000 Somalis since 2000, President Trump had ordered a temporary ban on accepting refugees. Around the world, countries were shutting their doors to people like Ayan, even as the number of refugees surged past 22 million in 2017, the highest in recorded history.