Diana Nyad: U.S. Swimmer Insane Training Schedule at 61 [PHOTOS & VIDEO]

U.S. swimmer Diana Nyad looks at the ocean before her attempt to swim to Florida from Havana August 7, 2011. The 61-year-old plunged into the Straits of Florida at dusk on Sunday to begin what she hopes will be a world record 103-mile (168 km) swim from Cuba to Florida. REUTERS

CNN will follow the champion long-distance U.S. swimmer as she takes on the shark-infested waters toward Florida.

Nyad announced Sunday morning at a Havana news conference that she planned to enter the water at Havana's Marina Hemingway to begin her attempt.

"We're going to get started tonight," she told CNN early Sunday morning as she stepped out of a car on her way to the news conference. "As you can probably tell, I'm pretty nervous. My adrenaline is flowing, but I've been training for two years."

Nyad went on to say, "All my life, I dreamed of being the first one ever to swim across without a shark cage," adding that when she turned 60, she "started thinking what if I went back and started to chase that elusive dream of Cuba."

Watch video below uploaded by Nyad!

Florida Cuba Cuba Cuba