Ukraine has joined the ballistic missile club in the same week it told the world how many ballistic missiles Russia has left to throw back. Euromaidan Press reports Kyiv fired its first FP-7 on Tuesday, day 1,685 of the war.

The reply is already priced. Foreign Minister Andrii Sybiha, in office as Ukraine's top diplomat, said last week that Kyiv estimates Russia is holding 600 ballistic missiles in reserve and can produce up to 140 a month.

That is a stockpile with a replenishment rate attached.

Ukraine's own strikes are not small. Russia says Ukraine launched its biggest strike of the war, 1,750 drones and 17 Flamingo missiles.

A drone attack on the Moscow region killed two people and injured nine, according to emergency services cited by the Sunday Guardian.

Kyiv also claims half of Russia's oil refining capacity is destroyed. That is Ukraine's own claim and the Guardian carries it as one. Boston Herald reporting says Kyiv is bracing for a large Russian reprisal.

Taiwan's air defence planners do not need to guess what a ballistic reserve of 600 does to a magazine. Kyiv has just published the arithmetic for them.

Every salvo Russia spends is an interceptor Ukraine's backers must find, and every interceptor found is one that is not available elsewhere, Taiwan included.