President Trump said Russia's drone attacks against Ukraine Thursday were part of Russian President Vladimir Putin's negotiation strategy ahead of talks in Alaska. "He's trying to set a stage," Trump said on Air Force One on his way to meet with Putin.

Ukrainian forces are increasing the intensity of long-range drone strikes deep into Russia ahead of Friday's planned meeting between Presidents Trump and Putin.

Ukrainian attacks against multiple cities in Russia left at least one person dead and 16 others wounded ahead of Trump's summit with Putin.