By CHRISTINA HOAG 2010-08-22T20:05:36Z LOS ANGELES (AP) -- Next month's opening of the Robert F. Kennedy Community Schools will be auspicious for a reason other than its both storied and infamous history as the former Ambassador Hotel, where the Democratic presidential contender was assassinated in 1968. With an eye-popping price tag of $578 million, it will mark the inauguration of the nation's most expensive public school ever....