On this edition of Africa 54, Chad's capitol N'Djamena is rocked by violent protests Tuesday morning as demonstrators take to the streets demanding a return to civilian rule; U.S. Secretary of State Antony Blinken presses Ethiopian Prime Minister Abiy Ahmed for troops from Eritrea involved in the Tigray conflict to be withdrawn; The WHO warns millions of children whose immunizations have been disrupted by the COVID-19 pandemic are now at risk from life-threatening diseases.