Hillary Harris and Dawn Johnson were strangers who shared a driveway - until Hillary made a life-altering discovery.

From a young age, Hillary knew she was adopted but later in life couldn't find her biological half-sister, Dawn.

She didn't expect her to move in next door, in their Wisconsin suburb.

This film is part of #CrossingDivides - a BBC season bringing people together. For more stories like this go to bbc.co.uk/crossingdivides

Video by Hannah Long-Higgins