Society · Argentina
—The alert. Argentina’s nuclear regulator has issued a national alert after a cesium-137 source went missing in Rosario.
—The source. It is a small calibration capsule used to check nuclear-medicine equipment, with an activity of about a hundred millicuries.
—The lapse. It had been left on a laboratory counter inside a lead container that had no security lock.
—The place. The theft was reported at a cardiology institute in the centre of Rosario, with access limited to four people.
