The government of El Salvador is charging a new $1,000 fee for passengers from African countries that fly into its capital’s international airport, a measure that comes as countries in the Western Hemisphere aim to stem a record flow of migration across the region. Salvadorean port authorities said that the measure would be applied to passengers in transit earlier this month, and that the tariffs were for “airport improvements” as more passengers were entering, leaving, and connecting through San Salvador this year compared to previous ones. “The Government of President Nayib Bukele is working...