VARIOUS SHOTS from inside the Chalk River Canadian Radioactive Materials Research Centre, in Chalk River, Ontario. A technician wearing a lab coat and gloves uses a metallic arm to manipulate a piece of radioactive material in another room. A pane of glass and a lead wall separate them. He places the radioactive material in a container made of lead, and covers it with cotton wool. Another technician seals the container with screws. He shuts the cover of the wooden box holding the lead container, and lifts it by handles on its sides.