By Joanie Morris Lexington, KY – The United States Equestrian Federation (USEF) will be represented at the CIC2* Greenwich Park Eventing Invitational (London Test Event) from July 4-6, 2011 by three American eventing riders. This competition will serve as a test event for the 2012 London Olympic Games and is an important part of the preparation for this competition.  Dressage, Eventing, Jumping and Para-Equestrian Dressage will all be held at the historic Greenwich Park next summer, the Olympic Games begin on July 27, 2012 and run through August 12.