Kigali Rwanda's highest buildings, including the 20-storey Kigali City Tower, are located in the CBD, as are the headquarters of the country's largest banks and businesses. Other buildings in the CBD include the upmarket Serena, Marriott and Mille Collines hotels, the University Teaching Hospital of Kigali, the national university's College of Science and Technology, and government buildings such as the National Bank of Rwanda and the Ministry of Finance and Economic Planning. To the south west of the CBD, and also on the Nyarugenge Hill, is the suburb of Nyamirambo. This was the second part of the city to be settled,
Kigali International Airport There is free WiFi in the airport waiting area. In 2014, Kigali Airport ranked 7th best regional airport in Africa, because of its capacity to respond to disaster, through its fire department (Category Nine), the second best according to International Aviation Organisation standards. Rwandair has its head office on the top floor of the airport main building. The airline previously had its head office in Centenary House in Kigali. The airline began moving its operations from Centenary House to the airport on Friday 14 May 2010. The airline was scheduled to be moved in by Monday 17 May 2010. In