Megan Jones of Australia rides on her horse in Hong Kong in 2007. Australia's Olympic equestrian hopes took a fresh knock Thursday when Jones was forced out through an injury to her horse, just days ... more 

Megan Jones of Australia rides on her horse in Hong Kong in 2007. Australia's Olympic equestrian hopes took a fresh knock Thursday when Jones was forced out through an injury to her horse, just days after she replaced an earlier withdrawal less