The United States is trying to push back on China's influence in Africa - and betting on Angola as a test case. For decades, China has bankrolled megaprojects in Africa - including ports, railways and power dams - under its multi-trillion-dollar Belt and Road Initiative, while the US largely overlooked the continent. But Washington is no longer staying on the sidelines. The US has pledged a billion dollars to refurbish the Lobito Atlantic Railway, its first major project in Africa in decades, wh