In the second episode of Diaspora Diaries, we speak to the co-founder of Black Lives Matter, Opal Tometi.

Opal was born in Phoenix, Arizona, in the US to Nigerian parents.

She grew up hearing Yoruba and Esan spoken at home - and says her first trip to Nigeria as a teenager, changed her life.

BBC Africa's Daniel Henry travelled to Washington DC to find out how those experiences led to Opal co-founding the Black Lives Matter movement in 2013.