[allAfrica] Washington, DC -- Invitations for African leaders to convene in world capitals have become regular features on the diplomatic calendar. The France-Africa Summit, an annual event since 1973, and periodic Tokyo International Conferences that began in 1993, have now been joined by similar gatherings in China, Turkey, India, Russia, various European Union capitals and the United Kingdom. U.S. President Barack Obama hosted African leaders in 2014, and now President Joe Biden is following suit with the second U.S.-Africa Leaders