Leaders of some 70 nations in Africa and Europe are seeking to improve political and economic cooperation between the two continents at a two-day summit, dpa reported. The meeting in Brussels beginning Wednesday will also center on development aid, climate change and migration. The European Union says leaders attending will include: U.N. Secretary-General Ban Ki-moon; French President Francois Hollande; German Chancellor Angela Merkel; Nigeria's President Goodluck Jonathan and Kenyan leader Uhuru Kenyatta.