A girl stands beside a laundry line in a poor neighborhood overlooking Cabinda, a heavily guarded territory that accounts for half of Angola’s oil output. (Nichole Sobecki/For The Washington Post) LUANDA, Angola — As the price of oil rose earlier this decade, this capital city did as well. Glass skyscrapers soared above the rubble of a 27-year civil war. American pop stars such as Mariah Carey were flown in to play private concerts. Luanda would become, its government announced, “a new Dubai.” But as oil prices have crashed, the impact on one of Africa’s richest and most unequal countries has been devastating. The same officials who boasted of Luanda’s sparkling ascent are asking for billions of dollars in loans. Thousands of people are dying of preventable illnesses , and the nation’s hospitals are out of medicine. A bag of rice can now cost five times what it did a […]