An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.

Fotografi 1: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012. AFP PHOTO / DAVID GANNON
Fotografi 2: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 3: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 4: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 5: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 6: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 7: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 8: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 9: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 10: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 11: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 12: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 13: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 14: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 15: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 16: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 17: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 18: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 19: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 20: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 21: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 22: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 23: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 24: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 25: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 26: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 27: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 28: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 29: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 30: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 31: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 32: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 33: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 34: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 35: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 36: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 37: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 38: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 39: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 40: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 41: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 42: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 43: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 44: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 45: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 46: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 47: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 48: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografi 49: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.