This is the third time in as many years, and two people died of radiation sickness after they opened the last stolen container. This makes it a very dangerous device in the wrong hands, since it can be used in a nuclear dirty bomb, which would spread deadly radiation over a block area or more if detonated correctly. This is the third time this has happened, and it will continue to happen if measures are not taken. Mexico needs to really take charge of these devices and other radiation sources. All it takes is one person or group to understand the threat it poses to develop a very simple bomb. A simple pipe bomb wrapped with this material can be deadly in a small area, using a higher explosive the the spread will become much larger.