Why have we not used a nuclear reactor to go to space?

We didn’t finish the bridge but, we set it up and it is holding 5.3 lbs (2.4 kilograms). The first picture is after 15 minutes and the second is after 12 hours. I think we are going to add more weight.

It’s not pretty, but I think it will hold 5lbs. Just like it is.

My students are learning a little bit of engineering this week and next. They started working on the final project: a popsicle bridge.