A report released on Sunday urged the world aviation bodies create new rules addressing the mental health concerns of pilots in the wake of last year's Germanwings crash, when a co-pilot deliberately flew a jet into the French Alps and killed 150 people on board. Air accident investigators concluded co-pilot Andreas Lubitz, who had been treated for depression, had consulted dozens of doctors in the weeks leading up to the March 24, 2015 crash. However, many doctors neglected to alert authorities that his mental health could threaten public safety, France's BEA investigation agency said. One doctor referred Lubitz to a psychiatric clinic just two weeks before the crash, according to the report. Lubitz neglected to share his doctors' warnings, which meant "no action could have been taken by the authorities or his employer to prevent him from flying."