Drones are “here and because they're ubiquitous, because they are quite useful and they're demonstrating that every day in Ukraine,” one analyst told NBC News.

Costing as little as $400 apiece, Kyiv’s flying machines are successfully neutralizing sophisticated Russian equipment worth thousands of times more

Explosions in the morning and afternoon rocked the symbolic bridge, but after several hours of closure, authorities said the span connecting Crimea to Russia, had reopened.