The Phantom Twin

Christa and her twin sister, Cara, did everything they could to set themselves apart - they wore different styles of clothes, pursued different careers, listened to different music. But when tragedy struck and Christa found herself without her other half, the lengths she went to to get close to her sister were beyond incredible.

Christa Parravani is a writer and photographer. For more on her life before and after her twin sister, check out her memoir, Her.

Producer: Nancy López