Plane from Kuala Lumpur to Beijing vanished with 239 people on board . The plane was carrying 227 passengers and 12 crew members when it disappeared early March 8 in the southern Indian Ocean off its flight path. Report looks at complete normality of flight which became huge mystery . Captain had no known history of anxiety or irritability , or family stresses . Relatives of passengers mark anniversary under heavy police presence .
Plane from Kuala Lumpur to Beijing vanished with 239 people on board . Wide search since incident on March 8 , 2014 has so far proved fruitless . Report looks at complete normality of flight which became huge mystery . Captain had no known history of anxiety or irritability , or family stresses . Relatives of passengers mark anniversary under heavy police presence .