DEL MAR, USA -- More elusive than the Scarlet Pimpernel, Frankie Dettori, who dropped a new retirement bombshell the previous afternoon, was nowhere to be seen as the sun came up over the Del Mar backstretch on Thursday morning. But that didn't stop the press pack from seeking him here, seeking him there. Would he be aboard Wimbledon Hawkeye as he emerged to take a turn on the turf around 7.15am? Nope. Nor was he to be found aboard the Japanese mare Argine, whose participation in the Breeders' Cup Mile...