From Yusra Mardini, a teenage swimmer from Syria who braved a Mediterranean crossing in a leaky dinghy, to Popole Misenga, who spent eight days hiding in a forest as a terrified child to flee bloody fighting, each of the refugee athletes have overcome daunting odds to maintain their Olympic dreams.
Mardini, 18, spoke of her delight on Saturday at the prospect of participating in Rio, where she will compete in the 100 meters butterfly and 100m freestyle.
Less than a year ago, Mardini was swimming for her life. During a perilous journey to Lesbos, the engine of their packed dinghy failed and the craft began taking on water.
Mardini and her sister jumped into the water, grabbed a rope and and spent the next three-and-a half-hours in the choppy water towing the boat to safety.
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Mardini, who has now settled in Germany with her family as a refugee, says she will proudly represent Syria, the Olympic movement and her recently adopted homeland when she competes in Brazil.
- 'We have iron wills' -
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Mardini is joined in the refugee ranks by another Syrian swimmer, Rami Anis. Anis fled Syria in 2011 to avoid being enlisted into the army, relocating to Belgium from Istanbul in October last year.
"I'm very proud to be here," Rami said.
"But I feel a bit of sadness that I'm not participating as a Syrian. We are representing people who have lost their human rights and are facing injustices."
"We have iron wills. We feel sad of course because of the wars in our countries," Anis said.
The 24-year-old broke down in tears when he was asked to comment on what message he hoped to send through his Olympic participation.
Misenga was just nine years old when he fled fighting in Kisangani in the Democratic Republic of Congo. Separated from his family, he hid in the jungle for eight days before being rescued and taken to a centre for displaced children in Kinshasa.
"I have two brothers that I haven't seen for years. I don't remember their faces," Misenga said tearfully on Saturday.
"I want to send them hugs and kisses. I'm here in Brazil participating so that one day I can bring them to live with me here in Brazil."
Another refugee from war in the Congo, Yolande Mabika, followed Misenga's journey by settling in Brazil.
"This is not just a struggle for sport it's a struggle for life. Each one of us had our own personal stories to tell," she says.
"People ask if they can win a medal. I say they have already won their medals just by getting to Rio," he said.