BANJUL (Reuters) - Europe and the United States should apologize to Africa for the cruelties of slavery, Venezuelan President Hugo Chavez said on Sunday, calling on African states to resist modern day U.S. colonialism. Attending a summit of African leaders in Gambia, Chavez said both Africa and Latin America had been blighted by slavery and colonialism for centuries, to the benefit of Europe and North America. "Africa is still weeping ... and Europe does not recognize it. Europe should apologize, get on its knees and apologize," Chavez, invited to attend the summit as a guest, told reporters. "They should lower...