On 24 January 1966, an Air India flight, Boeing 707, crashed in Mont Blanc, Switzerland. Onboard the aircraft was the ‘father of India’s nuclear programme,’ Dr Homi Jehangir Bhabha.

The plane crashed under mysterious circumstances–just thirteen days after the death of India’s second Prime Minister, Lal Bahadur Shastri. But even after decades, the reasons behind the plane crash remain shrouded in mystery; the case remains ill-investigated–even debris from the crash has not been recovered from the Swiss Alps.

However, there’s no shortage of conspiracy theories that surround the plane crash–and the deaths of Lal Bahadur Shastri and Homi Bhabha. For instance, the journalist Gregory Davis claims that Robert Crowley, a former Assistant Director of the CIA, revealed in a telephonic conversation that the CIA was behind the crash–ostensibly to thwart India’s nuclear programme. The telephone conversation, if true, is telling: