Missing radioactive capsule sparks search in Australia

Australian authorities are searching for a tiny radioactive capsule along a desert highway after it went missing while being transported from a mine in the country's remote west.

The 8mm by 6mm silver capsule, which is used in mining operations, has been unaccounted for since mid-January, and contains the radioactive substance Caesium-137.

It is believed to have fallen off a truck while being moved to a storage facility.