Rachel Dolezal - the white US woman who said she was black - says "the idea of race is a lie".

Speaking in an interview with Emily Maitlis, she argued that the concept of "transracial" - similar to that of transgender - is useful in describing people such as herself.

Rachel Dolezal has just written a book about her experience, In Full Color: Finding My Place in a Black and White World.

Watch the full BBC Newsnight interview here