American and Ukrainian officials have confirmed Kyiv employed US-made Atacms missiles to strike targets within Russia. The Kremlin stated that six missiles were launched at the town of Karachev, with fragments from one reportedly causing a significant explosion. In response, Russia has announced it is adjusting its nuclear doctrine. The Kremlin’s spokesperson, Dmitry Peskov, said Moscow would interpret any attack against it carried out by a non-nuclear state using weapons supplied by a nuclear state as a joint assault. But what exactly are Atacms, and why has their deployment unsettled Russia so deeply?
