In August 2024, the JUICE spacecraft performed a very special manoeuvre: the first-ever Lunar-Earth gravity assist (LEGA) manoeuvre. The concept was invented at ESOC in Summer 2013. In a first phase, the potential of the concept was analysed in detail by mission analysis, and its navigability was carefully studied to ultimately include it in the JUICE baseline. Once in flight, the key was accuracy and safety. These aspects were successfully handled by the ...