Andreas Lubitz crashed a Germanwing Airbus A320 into the French Alps in March,killing all 150 people on board.The accident,the German prosectors say Lubiz had suffered severe depression and many have feared losing his job. So he make a decision suiciding to conceal an illness from his employen.From his accident,all pilots should to be taken the psychological testing and there should be robust oversight of annual medical checks Whether pilots are fit to fly and prevent the future accidents.