A disappearing ink delivery system is disclosed. The system utilizes toy water guns and Gelbee toy guns. Disappearing ink can be loaded into the toy water guns and Gelbee toy guns for use to shoot targets. The disappearing ink can be created by a powder or a liquid in a container component that is mixed with water to form the disappearing ink. The mixture is then loaded into the toy water guns as ammunition. The mixture of disappearing ink will provide a mark on contact to confirm to the user that they have hit their target. However, the mark will not be permanent and will disappear shortly after contact.

The use of abrasive entrainment waterjet technology to cut improvised hazardous devices, such as improvised explosive devices (IEDs), located above or below ground. Abrasive is conducted to an entrainment abrasive waterjet cutting head under the control of an abrasive feed and metering system that monitors the flow rate of abrasive.

The use of abrasive entrainment waterjet technology to cut improvised hazardous devices, such as improvised explosive devices (IEDs), located above or below ground. Abrasive is conducted to an entrainment abrasive waterjet cutting head under the control of an abrasive feed and metering system that monitors the flow rate of abrasive.