Michael Phelps defends Shark Week 'race' against great white

Don't expect an apology from Michael Phelps to TV viewers who were disappointed with his race against a simulated great white shark for a Discovery Channel Shark Week special.The winningest athlete in Olympic history was bested by two seconds Sunday night in "Phelps vs. Shark: Great Gold vs. Great White." The race didn't pit Phelps against a real shark, but rather a computer-simulated fish based on data on the swimming speed of sharks.Phelps responded to critics in a Facebook Live video Tuesday.