James Webb Space Telescope

On the one hand, the JWST has been under development for nearly 30 years with BILLIONS of dollars on cost overruns and all sorts of technical issues leading up to now. I worry that this one is going to have a major problem while it sits at L5, where it will never be repaired.

But on the other hand, NASA landed not one but two rovers on MARS using the Bat CRAZY rocket powered skycrane. So they could nail this.

If they nail it, the world is gonna change.