IMAGE DISTRIBUTED FOR HUMANA- Photos taken President Clinton, PGA Tour golfer Gary Player, golf legend Billy Casper and Humana's Mike McCallister on the first tee during the first day of the Humana Challenge on Jan. 17, 2013, at PGA West in La Quinta, Calif. The 2013 Humana Challenge is being held January 14-20 at PGA West in La Quinta, Calif. (Rodrigo Pena / AP Images for Humana)

Associated Press
IMAGE DISTRIBUTED FOR HUMANA- Photos taken President Clinton, PGA Tour golfer Gary Player, golf legend Billy Casper and Humana's Mike McCallister on the first tee during the first day of the Humana Challenge on Jan. 17, 2013, at PGA West in La Quinta, Calif. The 2013 Humana Challenge is being held January 14-20 at PGA West in La Quinta, Calif. (Rodrigo Pena / AP Images for Humana)
IMAGE DISTRIBUTED FOR HUMANA- Photos taken President Clinton, PGA Tour golfer Gary Player, golf legend Billy Casper and Humana's Mike McCallister on the first tee during the first day of the Humana Challenge on Jan. 17, 2013, at PGA West in La Quinta, Calif. The 2013 Humana Challenge is being held January 14-20 at PGA West in La Quinta, Calif. (Rodrigo Pena / AP Images for Humana)
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