Angola and Namibia are neighboring countries in southern Africa. Angola is larger than Texas and California combined, covering over 480,000 square miles. It has a desert climate in the south and a tropical climate in the north. Diamonds are Angola's leading export as it is a key source. Namibia has a population of under 3 million and relies on diamond exports despite difficulties with farming due to its desert environment. It gained independence from South Africa in 1990 after 75 years of rule.