How to see through a wall covertly
What can you do if breaching isn't an option and more intelligence is necessary to make the call? It's potentially a hostage situation. Doors are barricaded. Windows are blocked. Every attempt at establishing communication has failed; no one's talking, and you can't see in ... yet. The wrong decision can transform the scene into a nightmare quickly. Time to think outside the box — or, rather, inside the box.
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