British-Australian marathon swimmer, Andy Donaldson, is attempting to break the world record by swimming over 34 miles along one of Australia's most crocodile-infested rivers. The 35-year-old currently holds three world records for the fastest long-distance open swims and hopes to achieve his fourth with this challenge. If successful, he will be the first man to hold the record and the second person after Simone Blaser in 2024.