Australian swimmer Chloe McCardel is planning to swim in June from Cuba to the U.S., but without the safety of a shark cage. She won’t be able to touch a chase boat or another person, she won’t use flippers or other swimming devices.  

If she's successful in June, it would set a new world record for longest solo unassisted ocean swim.

American swimmer Diana Nyad tried it four times, one of them earlier this year but had to give up halfway thru because of jellyfish stings, storms and hypothermia.

McCardel has swum the English Channel several times and has done is the fastest twice.