Israel fires “warning rockets” – often sent from drones – to alert residents that a building is to be targeted. The Israel Defense Forces (IDF) call the technique “roof knocking”, and claim it is a “time-tested strategy”. The warning rocket has no warhead, and is meant only to shake the building before armed missiles hit it three to 15 minutes later.
IDF "Roof Knocking" | Get the hell out of there
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