Russian and Ukrainian delegates are meeting in Istanbul on Monday for their second set of direct peace talks, a day after Kyiv launched a shock drone attack on Russia’s nuclear-capable bombers.

Ukraine questions Russia's commitment to peace after Moscow failed to send its negotiation proposals to Kyiv before the meeting.

The drone strikes on Russian air force bases weaken Moscow’s ability to wage war on its neighbor and undermine its capacity to threaten more distant rivals.

By making harsh, uncompromising demands in peace talks with Ukraine while continuing to pummel it with waves of missiles and drones, Russian President Vladimir Putin is sending a clear message: He will only accept a settlement on his terms and will keep fighting until they’re met.

With 41 military aircraft impacted, the Ukrainian drone attack was described by some commentators as Russia's "Pearl Harbor." The attack on Pearl Harbor in December 1941 was a surprise air raid by Japan on the U.S. during World War II. Kyiv's assault follows ground advances by Moscow troops in recent days in Ukraine's Sumy border region.

Ukrainian President Volodymyr Zelenskyy on Sunday praised Ukraine's Security Service for "brilliant operation" aimed at "military targets" on Russian territory.

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In Melitopol, Mavka talks of being part of a secret female resistance movement called Zla Mavka (Angry Mavka) "to let people know that Ukrainians don't agree with the occupation, we didn't call for it, and we will never tolerate it".