A group of activists who have been walking from Mali’s capital Bamako to Burkina Faso’s capital Ouagadougou to express their support for a federation between the two West African states arrives at the Thomas Sankara memorial, where they ended their March as a tribute to the former president and noted pan-Africanist, in Ouagadougou, Burkina Faso March 21, 2023. REUTERS/ O.ahmed