The US has announced it is expanding its curbs on immigration to include six more countries, including Nigeria, Africas most populous nation. Citizens from Nigeria, Eritrea, Sudan, Tanzania, Kyrgyzstan and Myanmar will now be blocked from obtaining certain types of visas. People from those countries will still be able to visit the US as tourists. In 2018 the US issued twice as many immigration visas to Nigeria than to the other five nations combined. Full story on BBC...