Secret service trainings and ideas

Can blind 4-8 people even, maybe. -They won't see anything for around 20-50 seconds. Multiple flashes possible. Important: No lasting damage. So some research is needed. And some research how well it works in the day. Maybe making a version which switches from light settings to settings when it's dark. - Knowledge, if needed, a cover might be needed for a normal camera flashgun, for getting it at the highest flash. - Works very well when it's dark outside. Tactic, dark room. Flashgun will have more effect.

Infrared camera flashguns. Because the flash will not be visable for the human eye. Important: First tests if it is safe for the eyes, for if a person is or could be on the photograph and also for the person taking the photograph if there is or if there could be a reflection.