Final answer:
The 'greatest heist in history' is the Great Train Robbery, a meticulously planned and executed robbery of a Royal Mail train in the UK in 1963.
Step-by-step explanation:
The 'greatest heist in history' refers to the robbery known as the Great Train Robbery, which took place on August 8, 1963 in the United Kingdom. A gang of fifteen men robbed a Royal Mail train carrying cash and valuables worth £2.6 million.
The heist was considered significant due to its meticulous planning, execution, and the amount stolen. It captivated the public's imagination and became a sensational news story at the time.
The robbery had a lasting impact on security measures for railway transportation and law enforcement strategies, making it one of the most renowned heists in history.
Learn more about Great Train Robbery