South African President Cyril Ramaphosa has declared a national "state of disaster" over the country's rolling power shortages. Energy provider Eskom says its ageing coal-fired power plants cannot keep up with demand and it's been imposing scheduled cuts. The blackouts are weighing on business activity and South Africa's economic growth. Also in the show: migrant workers building Senegal's "City of the Future" allege mistreatment and abuse on some construction sites.