By Anthony Deutsch IZIUM, Ukraine, May 31 (Reuters) - Roksolana Makar braved icy roads and the threat of drone strikes to interview a woman in the Ukrainian town of Izium who said Russian forces tortured her.

Drone command centers, units, and operators are highly valuable targets, so Ukraine keeps them mobile and underground.

Kyiv’s increased drone capabilities have offset the decrease in U.S. military aid.

CBS's Margaret Brennan interviewed Ukrainian President Volodymyr Zelenskyy, a portion of which aired on "Face the Nation," where he asked the U.S. for more support with anti-ballistic missiles. MARGARET BRENNAN: Right.

"Russia attacked us by lots of ballistic missiles on our energy infrastructure, water supply, schools," he said.

Ukraine’s early embrace of drones, and the mass-industrialization of their accuracy and power, has begun to exact a defining toll on Russia.

Russian drones are targeting public buses in Kherson, killing three transport workers so far this year.

After a series of gains last year, Russia’s advances along the over 600-mile front line have ground to a near halt recently, and Ukraine’s armed forces have launched successful counterstrikes and reclaimed some ground.

“Belarus lacks military sovereignty, and as soon as Moscow sees it as necessary for its strategy, Moscow will naturally use Belarus as a launchpad for a new invasion of Ukraine or some kind of armed conflict with NATO countries,” Zhyhar said, noting that Belarus offers a “very convenient springboard” for such an invasion.

Ukrainian drones struck a Russian fuel depot, oil pumping station and a refinery in an escalating campaign of strikes against energy infrastructure often hundreds of miles inside Russia.