Ngozi Okonjo-Iweala

Nigeria, with the oil sector, had the reputation of being corrupt and not managing its own public finances well. So what did we try to do? We introduced a fiscal rule that de-linked our budget from the oil price.

From 1967 to '70, Nigeria fought a war - the Nigeria-Biafra war. And in the middle of that war, I was 14 years old. We spent much of our time with my mother cooking. For the army - my father joined the army as a brigadier - the Biafran army. We were on the Biafran side.

The importance of heart health became very real for me when my father died of heart disease seven years ago. Having experienced the loss first hand, I am inspired to do everything I can to break the cycle and prevent families from losing loved ones to this preventable disease.