A riderless horse with with the riding boots of former U.S. President Ronald Reagan turned backwards, a sign of a fallen rider, walks behind his casket, along Constitution Avenue in Washington, D.C.

A riderless horse with with the riding boots of former U.S. President Ronald Reagan turned backwards, a sign of a fallen rider, walks behind his casket, along Constitution Avenue in Washington, D.C. © Mike Lynaugh

June 9, 2004 - A riderless horse with with the riding boots of former U.S. President Ronald Reagan turned backwards, a sign of a fallen rider, walks behind his casket, along Constitution Avenue in Washington, D.C.

© Mike Lynaugh