Original: The Operación Puerto doping case ( Operation Mountain Pass ) Inside the Blood Doping Investigation , Der Spiegel , July 10 , 2006 is a Spanish doping case against doctor Eufemiano Fuentes and a number of accomplices , started in May 2006 .
Simplified: The Operación Puerto doping case ( meaning Operation Mountain pass ) Inside the Blood Doping Investigation is a doping investigation in Spain .