Estonia's olympic team female marathon runners triplets (L-R) Lily, Liina and Leila Luik run during a training session in Tartu, Estonia, May 26, 2016. Leila, Liina and Lily Luik will make Olympics history as the first identical triplets to compete against each other when they cross the start line for the women's marathon in Rio. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets Lily (front), Leila (L) and Liina Luik exercise during a training session in Tartu, Estonia, May 26, 2016. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets (L-R) Leila, Liina and Lily Luik pose for a picture after a training session in Tartu, Estonia, May 26, 2016. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets (L-R) Leila, Liina and Lily Luik wear socks in Estonia's national colours during a training session in Tartu, Estonia, May 26, 2016. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets (L-R) Leila, Lily and Liina Luik take part in a training session in Tartu, Estonia, May 26, 2016. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets (L-R) Leila, Liina and Lily Luik pose during a training session in Tartu, Estonia, May 26, 2016. The shirts read “Trio for Rio”. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets (L-R) Leila, Liina and Lily Luik take part in a training session in Tartu, Estonia, May 26, 2016. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets (L-R) Lily, Liina and Leila Luik run during a training session in Tartu, Estonia, May 26, 2016. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets (L-R) Lily, Liina and Leila Luik run during a training session in Tartu, Estonia, May 26, 2016. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets (L-R) Leila, Lily and Liina Luik play with a tech installation after a training session in Tartu, Estonia, May 26, 2016. (Photo by Ints Kalnins/Reuters)





Estonia's olympic team female marathon runners triplets Leila, Liina and Lily Luik hold hands during a training session in Tartu, Estonia, May 26, 2016. (Photo by Ints Kalnins/Reuters)