WHAT COMMON FACTORS CONNECT THE DEATH OF MARY SANDERS DURING A SIMPLE SURGICAL INTERVENTION, CHERNOBYL NUCLEAR DISASTER, AND THE COSTA CONCORDIA SHIPWRECK? WAS IT A FATAL MINDSET, DEFECTIVE EQUIPMENT, AN ACT OF DESTINY OR...? IT IS THE HUMAN ERROR THE THREAD THAT BINDS THESE (AND MANY OTHER) TRAGIC EVENTS. HOW TO BEST PREVENT, MANAGE AND MITIGATE ITS EFFECTS AND CONSEQUENCES IS THE SUBJECT OF STUDY BY CPT. FERDINANDO RESTINA.