Anita Powell JOHANNESBURG ? The U.S. government is investing more than $1 billion to create about 20 million new electricity connections in sub-Saharan Africa as part of its ldquo;Beyond the Gridrdquo; Initiative. The African continent has the worldrsquo;s lowest rates of electrification, a fact that caught the attention of U.S. President Barack Obama when he visited the continent last year. So he announced an ambitious plan to electrify 20 million households in six countries: Ethiopia, Ghana, Kenya, Liberia, Nigeria and Tanzania. U.S. Secretary of Energy Ernest Moniz visited the Ethiopian capital...