Note that they don't need a search warrant to search your car, unless it is parked at your house. They need only PC, or probable cause - which they clearly didn't have. Again, thanks for standing up to them! Also if your car is impounded for any reason they can also conduct an 'inventory check' of the trunk.
We only use 670 tons of uranium fuel each year - the rest is stored. From
"Worldwide, we 'use' about 67,000 tons of uranium per year, 670 tons of which is actually used (the rest is stored)."
You do know we can look this stuff up now with google and all, don't you?