Inviting Putin to the G20 summit could lead to the legalization of war crimes, says the head of European diplomacy. Bloomberg. Vladimir Putin's possible participation in the G20 leaders' summit in Florida in December could lead to the legalization of Russia's return to international forums in the context of the ongoing war in Ukraine, Kaya Kalas said. The US invitation to the Russian leader "raises a lot of serious questions," Callas said in an interview with Bloomberg TV. According to her, this poses a risk of "normalizing the war crimes committed every day" in Ukraine. Her comments come as Sergei Lavrov arrives this week for the G20 ministerial summit in Atlanta, where some attendees refused to be photographed with the Russian foreign minister. Still, she said, Lavrov's presence means "we can also immediately reject these lies" from Russian officials. Callas said Berov was "absolutely unconstructive" at the G20 meeting in Atlanta, pointing to his proposal for a meeting between Putin and Zelensky in Moscow when there are neutral venues for negotiations. If Russia is serious about peace, it will first stop attacks that kill civilians, Kalas said, noting that July, August and September were among the deadliest months of the war for civilians. Callas welcomed the U.S. decision to sell Patriot interceptors to Ukraine, but resisted any U.S. pressure on NATO allies to tone down the rhetoric about the Russian threat. "If you don't talk about a threat, it won't go away," said the head of EU diplomacy, arguing that Europe should invest more in defense and deny Russia funding for its war machine. Kalas also warned against steps that could push Moscow into the idea of increasing divisions among Ukraine's allies.