Ukraine staged a dramatic series of strikes across Russia, deploying drones hidden in trucks deep inside the country to hit strategic airfields as far away as eastern Siberia. Around the same time, Moscow launched one of its longest drone and missile attacks against Kyiv, escalating tensions ahead of crucial peace talks this week. More than 40 Russian aircraft, including the Tu-95 and Tu-22 M3 long-range bombers capable of deploying conventional and nuclear weapons as well as the A-50, were reportedly damaged in Sunday’s operation, an official in Ukraine’s Security Service said on condition of anonymity as the details are not public. Ukraine’s Security Service chief Vasyl Malyuk led the operation and losses are assessed to be at least $2 billion, the person said. Drones were released remotely from wooden mobile houses that were transported on trucks inside Russian territory, according to the official. Ukrainian President Volodymyr Zelenskiy revealed details of the operation, saying it was “one year, six months, and nine days from the start of planning to effective execution.” He added, “Our most long-range operation. Our people involved in preparing the operation were withdrawn from Russian territory in time.” In a separate post on Telegram, Zelenskiy said Ukraine used 117 drones with people operating inside Russia across three time zones, adding that “34% of strategic cruise missile carriers at the airfields were hit.” Russia’s Defense Ministry confirmed in a Telegram statement that attacks occurred at five military airbases across the nation from the Far East and eastern Siberia to locations just several hundred miles from Moscow. Earlier on Sunday, Ukraine came under one of the longest barrages from Russian missiles and drones, with air sirens lasting for more than 9 hours. At least 12 people were killed in a strike on a military training center, prompting Ukraine Ground Forces Commander Mykhaylo Drapatyi to announce his decision to resign due to the cas The incidents occurred just as Moscow and Kyiv prepare to send delegations to Turkey for a second round of peace talks on Monday. The opening round on May 16 — the first in more than three years — ended with a prisoner exchange agreement and discussions on a potential ceasefire. So far, Russia has not signaled if the attacks may affect the talks.