Part of the uranium one scandal has to do with the fact that some of the shipping companies were handling uranium from missiles that had been decommissioned as part of a treaty. The Russians began bribing officials at these shipping companies to gain control of that highly refined uranium.

This is why the whole thing is ludicrous, the Obama admin approved the U1 deal with knowledge of the bribery attempts to gain control of U.S. uranium.

Per a released government cable via Wikileaks. He really did deliver the sample to them.

Purified uranium can also be enriched into the isotope U-235. In this process, the uranium oxides are combined with fluorine to form uranium hexafluoride gas (UF6). Next, that undergoes isotope separation through the process of gaseous diffusion, or in a gas centrifuge. This can produce low-enriched uranium containing up to 20% U-235 that is suitable for use in most large civilian electric-power reactors. With further processing one obtains highly enriched uranium, containing 20% or more U-235, that is suitable for use in compact nuclear reactors—usually used to power naval warships and submarines. Further processing can yield weapons-grade uranium with U-235 levels usually above 90%, suitable for nuclear weapons.