(Left) Aug. 18, 2012 file photo shows Diana Nyad adjusting her swimming cap as a woman applies a protective ointment to her skin as she prepares to jump into the water and start her swim to Florida from Havana, Cuba. (Right) Nyad rests after she was pulled out of the water between Cuba and the Florida Keys early Tuesday, Aug. 21, 2012. (AP)
U.S. swimmer Diana Nyad stands after a press conference where she announced her upcoming swim from Cuba to Key West, Florida, in Havana, Cuba, Saturday, Aug. 18, 2012. She attempted her fourth time swim across the Florida Straights without the protection of shark cage in hopes of setting a world record. A storm and jellyfish prevented her from making it across. (AP Photo/Ramon Espinosa)
U.S. swimmer Diana Nyad announces her upcoming swim from Cuba to Key West, Florida, in Havana, Cuba, Saturday, Aug. 18, 2012. (AP Photo/Ramon Espinosa)
People from the local nautical club carry a Cuban and a U.S. flag to the coast to watch U.S. swimmer Diana Nyad start her swim to Florida from Havana, Cuba, Saturday, Aug. 18, 2012. Endurance athlete Nyad launched another bid Saturday to set an open-water record by swimming from Havana to the Florida Keys without a protective shark cage. (AP Photo/Ramon Espinosa)
FILE - This Aug. 18, 2012 file photo shows Diana Nyad adjusting her swimming cap as a woman applies a protective ointment to her skin as she prepares to jump into the water and start her swim to Florida from Havana, Cuba. Her goal of swimming from Cuba to Florida appearing elusive, Nyad was out of the water Tuesday morning, Aug. 21, 2012, being checked by doctors on a boat and discussing whether she could return to a fourth day of swimming. (AP Photo/Ramon Espinosa, File)
U.S. swimmer Diana Nyad plays a trumpet and points to Florida before starting her swim as people from the local nautical club hold a Cuban and U.S. flag behind her in Havana, Cuba, Saturday, Aug. 18, 2012. Endurance athlete Nyad launched another bid Saturday to set an open-water record by swimming from Havana to the Florida Keys without a protective shark cage. (AP Photo/Ramon Espinosa)
In this photo released by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad gets set to jump into the water in Havana, Cuba, Saturday, Aug. 18, 2012, to start a more-than-100-mile trip across the Florida Straits to the Florida Keys. Nyad, who turns 63 on Aug. 22, is trying to be the first swimmer to cross the Straits without a shark cage. (AP Photo/ Diana Nyad via the Florida Keys News Bureau, Christi Barli)
U.S. swimmer Diana Nyad jumps into the water as people from the local nautical club hold a Cuban and U.S. flag behind her in Havana, Cuba, Saturday, Aug. 18, 2012. Endurance athlete Nyad launched another bid Saturday to set an open-water record by swimming from Havana to the Florida Keys without a protective shark cage. (AP Photo/Ramon Espinosa)
U.S. swimmer Diana Nyad jumps into the water to start her swim to Florida from Havana, Cuba, Saturday, Aug. 18, 2012. Endurance athlete Nyad launched another bid Saturday to set an open-water record by swimming from Havana to the Florida Keys without a protective shark cage. (AP Photo/Ramon Espinosa)
In this photo provided by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad swims in the Florida Straits between Cuba and the Florida Keys Monday, Aug. 20, 2012. (AP)
In this photo taken Monday, Aug. 13, 2012, and released by the Florida Keys News Bureau on Thursday, Aug. 16, 2012, Bonnie Stoll, left, and Allison Milgard, right, help endurance swimmer Diana Nyad put on protective garb designed to fend off stings from jellyfish tentacles during a training session off Key West, Fla., for a swim from Havana, Cuba, to the Florida Keys. Nyad, who turns 63 on Aug. 22, plans to begin her fourth attempt at the feat on Sunday, Aug. 19. (AP Photo/Florida Keys News Bureau, Presley Adamson)
In this photo provided by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad is hydrated by a crew member in the Florida Straits between Cuba and the Florida Keys Monday, Aug. 20, 2012. (AP Photo/Diana Nyad via the Florida Keys News Bureau, Christi Barli)
In this photo taken Monday, Aug. 13, 2012, and released by the Florida Keys News Bureau on Thursday, Aug. 16, 2012, a cruise ship passes in the distance as Diana Nyad trains off Key West, Fla., for a swim from Havana, Cuba, to the Florida Keys. Nyad, who turns 63 on Aug. 22, has announced that she plans to begin her fourth attempt at the feat on Sunday, Aug. 19. The rope to the left of Nyad hangs off a support boat boom and trails an underwater white strip that Nyad used to maintain course. (AP Photo/Florida Keys News Bureau, Presley Adamson)
In this photo taken Monday, Aug. 13, 2012, and released by the Florida Keys News Bureau on Thursday, Aug. 16, 2012, team members on a support boat observe Diana Nyad as she trained off Key West, Fla., for a swim from Havana, Cuba, to the Florida Keys. The boom on the boat's starboard, right, side trailed an underwater white strip that Nyad used to maintain course. (AP Photo/Florida Keys News Bureau, Presley Adamson)
In this photo taken Monday, Aug. 13, 2012, and released by the Florida Keys News Bureau on Thursday, Aug. 16, 2012, Diana Nyad wears protective garb designed to fend off stings from jellyfish tentacles as she trains off Key West, Fla., for a swim from Havana, Cuba, to the Florida Keys.(AP Photo/Florida Keys News Bureau, Presley Adamson)
In this photo taken Monday, Aug. 13, 2012, and released by the Florida Keys News Bureau on Thursday, Aug. 16, 2012, team leader Bonnie Stoll, left, watches endurance swimmer Diana Nyad as she trains off Key West, Fla., for a swim from Havana, Cuba, to the Florida Keys. (AP Photo/Florida Keys News Bureau, Presley Adamson)
In this photo provided by Diana Nyad via the Florida Keys News Bureau, boats escorting endurance swimmer Diana Nyad ply the Florida Straits between Cuba and the Florida Keys Monday, Aug. 20, 2012. (AP Photo/Diana Nyad via the Florida Keys News Bureau, Christi Barli)
In this photo provided by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad swims in the Florida Straits between Cuba and the Florida Keys Sunday, Aug. 19, 2012. Nyad is endeavoring to become the first swimmer to transit the Florida Straits from Cuba to the Keys without a shark cage. (AP Photo/Diana Nyad via the Florida Keys News Bureau, Christi Barli)
Foto de Diana Nyad vía Florida Keys News Bureau nadando entre Cuba y los cayos de la Florida el domingo, 19 de agosto del 2012. Nyad aspira a ser la primera mujer que nade entre Cuba y la Florida sin la protección de una jaula contra tiburones. (Foto AP/Diana Nyad vía the Florida Keys News Bureau, Christi Barli)
In this photo provided by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad swims in the Florida Straits between Cuba and the Florida Keys Sunday, Aug. 19, 2012, escorted by support personnel in kayaks. Nyad is endeavoring to become the first swimmer to transit the Florida Straits from Cuba to the Keys without a shark cage. The white underwater strip, tethered to the boom from her primary support vessel, provides Nyad a moving swimming lane so she can maintain a proper course. (AP Photo/Diana Nyad via the Florida Keys News Bureau, Christi Barli)
In this photo provided by the Florida Keys News Bureau, endurance swimmer Diana Nyad receives hydration and advice from her support team off Havana, Cuba, Saturday, Aug. 18, 2012, during the first night of a 100-mile-plus swim across the Florida Straits to the Florida Keys. Nyad, who turns 63 on Aug. 22, is trying to be the first swimmer to cross the Straits without a shark cage. (AP Photo/Diana Nyad, via the Florida Keys News Bureau, Christi Barli)
In this photo released by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad swims off Havana, Cuba, Saturday, Aug. 18, 2012, as she begins a more than 100-mile trip across the Florida Straits to the Florida Keys. Nyad, who turns 63 on Aug. 22, is trying to be the first swimmer to cross the Straits without a shark cage. (AP Photo/ Diana Nyad via the Florida Keys News Bureau, Christi Barli) (AP2012)
U.S. swimmer Diana Nyad starts her swim after jumping into the water off the coast of Havana, Cuba, Saturday, Aug. 18, 2012. Endurance athlete Nyad launched another bid Saturday to set an open-water record by swimming from Havana to the Florida Keys without a protective shark cage. (AP Photo/Ramon Espinosa)
U.S. swimmer Diana Nyad, bottom, begins her swim to Florida from the waters off Havana, Cuba, Saturday, Aug. 18, 2012. Endurance athlete Nyad launched another bid Saturday to set an open-water record by swimming from Havana to the Florida Keys without a protective shark cage. (AP Photo/Ramon Espinosa)
In this photo provided by Diana Nyad, via the Florida Keys News Bureau, Diana Nyad takes a break after reportedly being stung by a jellyfish Saturday, Aug. 18, 2012, off Havana, Cuba. Nyad, who turns 63 Aug. 22, is trying to be the first swimmer to cross the Florida Straits without a shark cage. (AP Photo/Diana Nyad via the Florida Keys News Bureau, Christi Barli)
In this photo provided by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad is aided after she was pulled out of the water between Cuba and the Florida Keys early Tuesday, Aug. 21, 2012. Nyad has ended her fourth bid to swim from Cuba to Florida after four days of storms, jellyfish stings and shark threats. (AP Photo/Diana Nyad via the Florida Keys News Bureau, Christi Barli)
In this photo provided by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad rests after she was pulled out of the water between Cuba and the Florida Keys early Tuesday, Aug. 21, 2012. Nyad has ended her fourth bid to swim from Cuba to Florida after four days of storms, jellyfish stings and shark threats.(AP Photo/Diana Nyad via the Florida Keys News Bureau, Christi Barli)
In this photo provided by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad rests after being pulled out of the water between Cuba and the Florida Keys early Tuesday, Aug. 21, 2012. Nyad has ended her fourth bid to swim from Cuba to Florida after four days of storms, jellyfish stings and shark threats. (AP Photo/Diana Nyad via the Florida Keys News Bureau, Christi Barli)