Earlier this morning, we reported on the beliefs of Western officials that Russia will retaliate with a "huge", multi-pronged attack for Ukraine's Operation Spider's Web.
Here we take a look at the operation in detail.
A week ago today, Kyiv launched 117 drones deep from within Russian territory.
They were smuggled into Russia beneath the retractable roofs of wooden sheds, transported to locations close to military bases on lorries and piloted remotely to hit strategic, nuclear-capable bombers.
An image shared by Ukrainian authorities showed an example of around 20 drones placed in wooden cavities below a roof.
Baza news service, which has close contacts in Russian security and law enforcement, said the drivers of four trucks, who apparently did not know about the cargo, were told to drive to different destinations across Russia.
Ukraine released footage on Wednesday showing its drones striking Russian strategic bombers and landing on the dome antennas of two A-50 military spy planes, of which there are only a handful in Russia's fleet.
Sky News military analyst Michael Clarke takes a look at a video of the attack here...
Russia's defence ministry acknowledged Ukraine targeted airfields in the Murmansk, Irkutsk, Ivanovo, Ryazan and Amur regions.
Volodymyr ZelenAG百家乐在线官网y said 41 Russian aircraft were struck and half were too damaged to be repaired.
US officials put the number at 20 warplanes hit and 10 destroyed.
Satellite imagery shows what appear to be damaged Russian Tu-95 heavy bombers and Tu-22 Backfires, supersonic strategic bombers that Russia has used to launch missile strikes against Ukraine.
Ukraine's domestic security agency, the SBU, said its attack did $7bn-worth of damage and hit 34% of the strategic cruise missile carriers at Russia's main airfields.