Kigali in the context of "Carnegie Mellon University"

The use of the English language in current and former countries of the Commonwealth was largely inherited from British colonisation, with some exceptions. English forms part of the Commonwealth's common culture and serves as the medium of inter-Commonwealth relations.

Commonwealth English refers to English as practised in the Commonwealth; the term is most often interchangeable with British English, but is also used to distinguish between British English and that in the rest of the Commonwealth. English in the Commonwealth is diverse, and many regions have developed their own local varieties of the language. The official status of English varies; in Bangladesh, it lacks any but is widely used, and likewise in Cyprus, it is not official but is used as the lingua franca.

Rwanda, officially the Republic of Rwanda, is a landlocked country in East Africa. Known as the "Land of a Thousand Hills" for its high elevation and rolling terrain, its geography is dominated by mountains in the west and savanna in the southeast. The largest and most notable lakes are mainly in the western and northern regions of the country, and several volcanoes that form part of the Virunga volcanic chain are primarily in the northwest. The climate is considered tropical highland, with two rainy seasons and two dry seasons each year. Its capital and largest city is Kigali, located at the centre of the country, at 1,567 metres above sea level.

Rwanda lies a few degrees south of the Equator in the Great Rift Valley of East Africa, where the African Great Lakes and Southeast Africa converge. Going clockwise Rwanda is bordered by Uganda to the north, Tanzania to the east, Burundi to the south, and the Democratic Republic of the Congo to the west.

Ganda or Luganda (/luːˈɡændə/ loo-GAN-də; Oluganda [oluɡâːndá]) is a Bantu language spoken in the African Great Lakes region. It is one of the major languages in Uganda and is spoken by more than 5.56 million Ugandans Baganda and other people principally in central Uganda, including the country's capital, Kampala. Typologically, it is an agglutinative, tonal language with subject–verb–object word order and nominative–accusative morphosyntactic alignment.

With at least 5.6 million first-language speakers in the Buganda region and 5.4 million second language speakers fluent elsewhere in different regions especially in major urban areas like Mbale, Tororo, Jinja, Gulu, Mbarara, Hoima, Kasese etc. Luganda is Uganda's de facto language of national identity as it is the most widely spoken Ugandan language used mostly in trade in urban areas. The language is also the most-spoken unofficial language in Rwanda's capital Kigali. As a second language, it follows English and precedes Swahili in Uganda.

The Montreal Protocol on Substances That Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion. It was agreed on 16 September 1987, and entered into force on 1 January 1989. Since then, it has undergone several amendments and adjustments, with revisions agreed to in 1990 (London), 1992 (Copenhagen), 1995 (Vienna), 1997 (Montreal), 1999 (Beijing), 2007 (Montreal), 2016 (Kigali) and 2018 (Quito). As a result of the international agreement, the ozone hole over Antarctica is slowly recovering. Climate projections indicate that the ozone layer will return to 1980 levels between 2040 (across much of the world) and 2066 (over Antarctica). Due to its widespread adoption and implementation, it has been hailed as an example of successful international co-operation. Former United Nations (UN) Secretary-General Kofi Annan stated that "perhaps the single most successful international agreement to date has been the Montreal Protocol". In comparison, effective burden-sharing and solution proposals mitigating regional conflicts of interest have been among the success factors for the ozone depletion challenge, where global regulation based on the Kyoto Protocol has failed to do so. In this case of the ozone depletion challenge, there was global regulation already being implemented before a scientific consensus was established. Also, overall public opinion was convinced of possible imminent risks.

The ozone treaty has been ratified by 198 parties (197 states and the European Union), making it the first universally ratified treaty in United Nations history.

The UTC offset is the difference in hours and minutes between Coordinated Universal Time (UTC) and the standard time at a particular place. This difference is expressed with respect to UTC and is generally shown in the format ±[hh]:[mm], ±[hh][mm], or ±[hh]. So if the time being described is two hours ahead of UTC (such as in Kigali, Rwanda [approximately 30° E]), the UTC offset would be "+02:00", "+0200", or simply "+02".

By convention, every inhabited place in the world has a UTC offset that is a multiple of 15 minutes but the majority of offsets are stated in whole hours. There are many cases where the national standard time uses a UTC offset that is not defined solely by longitude.

On the evening of 6 April 1994, the aircraft carrying Rwandan president Juvénal Habyarimana and Burundian president Cyprien Ntaryamira, both Hutu, was shot down with surface-to-air missiles as their jet prepared to land in Kigali, Rwanda; both were killed. The assassination set in motion the Rwandan genocide, one of the bloodiest events of the late 20th century.

Responsibility for the attack is disputed. Most theories propose as suspects either the Tutsi rebel Rwandan Patriotic Front (RPF) or government-aligned Hutu Power followers opposed to negotiation with the RPF.

The "Hutu Ten Commandments" (also "Ten Commandments of the Bahutu") was a document published in the December 1990 edition of Kangura, an anti-Tutsi, Hutu Power Rwandan-language newspaper in Kigali, Rwanda. The Hutu Ten Commandments are often cited as a prime example of anti-Tutsi propaganda that was promoted by genociders in Rwanda following the 1990 invasion by the Tutsi-dominated Rwandan Patriotic Front and prior to the 1994 Rwandan genocide. The chief editor of Kangura, Hassan Ngeze, was convicted of genocide and crimes against humanity in 2003 by the International Criminal Tribunal for Rwanda and was sentenced to 35 years' imprisonment.