the Paralympics. >> Getting away >> very nicely is Pergolina Gia going for USA in lane 4. Record setting performances at the trials, indeed, they're record setting in the Paralympics on day two of competition. She smashed the world record. Dedekind is stuck at the moment between Mirzokhidova. Pergolina Gia off the pace. We expected that >> from her. She's out faster than she was during the Paralympics. So she is on world record time. She's coming now in the back half, all she has to do for this second 50 is build it. She can't let that speed come down at all, otherwise she's going to miss out on both the gold medal and the record. A chance to >> take the gold medal here is not going to be given up by Gia Pergolina Gia, the world record holder. Is ahead of her world record pace. The real battle is for silver between Gilli and Dedekind. But the Pergolina Gia becomes the Paralympic Games champion. A world record. A sensational swim as she sees CarlottaGilli take silver. And Dedekind takes bronze. But Gia Pergolina Gia - well, she went in the women's - she's broken the world record twice in a day and become Paralympic champion. At 17 years old! She's been swimming since the age of five. She's been aiming for something big. Somebody diagnosed with Stargart disease. Here she is >> off the blocks. She explodes and goes right into the underwater. She had a very good start and really attacked that first 50. For that first 50, you have to control it, you have to go fast but make sure you have enough to come home. Pergolini certainly did. She goes into the underwater dolphin - she was very deep here and maximises her time under water so when she pops up she's going as fast as she can. She reaches behind her, very clean stroke as she approaches the wall. She perfectly times the finish. What a day