NASA's $5 billion Europa Clipper had a rocky road to space. How it switched rockets and more to launch to Jupiter 

 NASA's $5 billion Europa Clipper probe overcame huge obstacles, including a switch to an entirely different rocket, to launch toward Jupiter. Here's how it happened. 

https://cdn.mos.cms.futurecdn.net/NDgDS4Ebivgn68ancGeLcJ.jpg

https://www.space.com/nasa-europa-clipper-rocky-road-jupiter-launch