When triggered, the electrodes... ...will send a charge converting the chemical into gas.

When triggered, the electrodes... ...will send a charge converting the chemical into gas.

When triggered, the electrodes... will send a charge converting the chemical into gas.

When triggered, the electrodes... ...will send a charge converting the chemical into gas.

When triggered the electrodes will send a charge converting the chemical into gas the gas will travel up that shaft and filter through the ventilation system that leads directly to Parliament.

When triggered, the electrodes will send a charge converting the chemical into gas. and the gas will travel up that shaft and filter through the ventilation system that leads directly to parliament.