"Some have asked us why inert grenades are dangerous since they are dormant. The answer is that they are not dangerous. The issue with inert grenades is that they look like live grenades during screening. When a potential explosive is detected, we must follow protocols that can cause screening areas and even terminals to be closed and evacuated. When checkpoints are closed, flights are delayed and sometimes missed causing the airline and travelers frustration. Another reason all inert grenade related items are prohibited is the panic that could ensue if a passenger were to reveal a grenade while in the cabin of an aircraft. Grenade shaped belt buckles, lighters, soap, candles, MP3 players, paperweights, inert training grenades, and other items can all look like the real item on the x-ray monitor. Please leave these items at home, or find another way of getting them to your destination."