Forget sibling rivalry, this is a story of sibling love.
Twin sisters Tracy and Lanny Barnes are both biathlon athletes with Olympic dreams.
But last weekend, both were competing for spots on Team USA when Tracy finished strong and earned her spot and Lanny did not.
Lanny became sick and her Olympic dreams vanished but that's when Tracy stepped in.
She sacrificed her own spot on the team so her sister could go instead.
Speaking on "New Day" Thursday about her decision, Tracy said once she found out her sister was getting ill the idea started going through her head to help Lanny if she didn't make the Olympics cut.
"I think I decided before the last race of the Olympic trials – that I had a good idea that I'd make the team because of my results... So after the team was announced, we went hiking in the mountains and I told her I have something to tell you and she obviously protested."
WATCH THE VIDEO ABOVE TO SEE LANNY'S REACTION