A new initiative in South Africa is safely placing radioactive isotopes into rhino horns and using existing nuclear security infrastructure to detect and deter illegal trade. Sean Hogan has more.

In an effort to combat the poaching of rhinos in South Africa, the Rhisotope Project is injecting radioactive isotopes into rhino horns to deter traffickers. Injecting a small amount of radioactive material into the horns makes them detectable by radiation portal monitors already deployed at borders,