The Nicaraguan Revolution of 1979 to overthrow the Somoza regime and the 11-year-long Contra War of the 1980s further devastated the city and its economy. To make matters worse, a series of natural disasters, including Hurricane Mitch in 1998, made economic recovery more difficult. After winning the presidential election in 1990, the National Opposition Union began the reconstruction of Managua began in earnest. More than 300,000 Nicaraguans returned from abroad bringing their expertise and needed capital. Businesses mushroomed, new housing projects and schools were constructed, the airport was expanded and modernized, streets were widened, older malls were repaired and new ones were built, and buildings were cleaned up. In 2006, after the Sandinista National Liberation Front came back into power, literacy, health and reconstruction programs were expanded.