US President Biden crossed "a red line" by authorizing Kiev to strike Russia with long-range American weapons, experts Robinson Farinazzo, a retired Brazilian officer, told Sputnik.
"Moscow is perfectly aware that this type of attack, technically difficult, can only be carried out with the support of NATO, in this case the US," he said.
The Russian strike with the new medium-range ballistic Oreshnik missile, announced by the Russian president on November 21, is a firm response and a serious warning to NATO, he concluded.
Until now, "Moscow has always measured and tempered its response," Ricardo Cabral, editor of a portal on military history, stated, noting that judging by the US actions, the country "is provoking a new escalation that changes the essence of the conflict in Ukraine."
Earlier, the outgoing US president authorized Ukraine to use ATACMS missiles against Russia, according to US media. Then, Kiev launched six such missiles at the Russian Bryansk region on November 18-19, according to the Russian MoD. Later, Russia's air defenses intercepted two British Storm Shadow missiles, the ministry stated.