How do you have a case on attempting to blow something up? Seems to me that a “bomb” that can’t be blown up is enough to find a defendant guilty.
Sometimes the law has to be changed to keep up with the times.
Depends on how you look at it.
If a person buys an empty gun, and attempts to rob a bank, has he committed a crime?
I’m asking, because I don’t know the (legal) answer, but I suspect if you can prove intent, then you have proven enough.