[VOA] White House -- President Joe Biden will make his first presidential trip to Africa next week, visiting Angola and making a stop in the island nation of Cabo Verde, a top White House official told VOA. His short visit will center around the Lobito Corridor, a 1,300-kilometer rail line that brings resources from the continent's rich interior to Angola's busiest port. VOA's Philip Alexiou spoke exclusively with Frances Brown, senior director for African affairs at the National Security Council. This interview has been