Europe's JUICE probe will be 1st to use gravity of Earth and moon to slingshot to Jupiter 

 The spacecraft recently burned 10 percent of its total fuel in a single 43-minute maneuver as preparation for the double gravity assist. 

https://cdn.mos.cms.futurecdn.net/wiHouwPrW6ZvYRKBxqV5hJ.jpg

https://www.space.com/esa-juice-spacecraft-executes-major-maneuver