[mhh__]

The problem is it's not even known whether the engineering problems can be attacked at all, unlike the Apollo program where even though a large amount of work (Breadth rather than depth this time) it was an iterative evolution of past programs.

[maxxxxx]

In 1960 they had no idea how rendezvous in space or a lot of other things would work but they knew they would figure it out with enough time and money . From whatever I have heard about fusion I have never heard about doubts about feasibility. It’s about trying out different things and getting experience since the knowledge in plasma physics is so thin.