Ukraine is claiming back territory at an extraordinary rate and much of its success is thanks to cheap and effective drones.
It comes amid reports Russian President Vladimir Putin is spending much of his time underground, moving between bunkers, due to fears of an attack.
The Security Brief explains how these drones work and why they pose such a risk to mainland Russia.
We speak to Daria, a Ukrainian sniper turned drone commander, who tells us why this war is unlike any other.
Presented by Christian Fraser and former strategic military planner Mikey Kay.
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