Liberia leader pays tribute to Ethiopian PM Meles Zenawi
21 August 2012 Last updated at 15:10 BST
The Ethiopian Prime Minister Meles Zenawi has died at the age of 57, after weeks of speculation about his health.
African leaders have been paying tribute to Meles Zenawi.
The President of Liberia, Ellen Johnson Sirleaf, said Africa had lost one of its pre-eminent thinkers.