Is it ensure, insure, or assure?
African nation, named for indigenous people there, whose word for themselves is of unknown origin.
Note: Rwanda gained its independence from Belgium in 1962.
Note: It has long been marked by ethnic strife between majority Hutus and dominant Tutsis. When its president died in a suspicious plane cash in 1994, Hutu militia massacred at least 500,000 Tutsis in an act of genocide.