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.

It's hard to exaggerate the sheer audacity - or ingenuity - that went into Ukraine's countrywide assault on Russia's air force. We cannot possibly verify Ukrainian claims that the attacks resulted in $7bn (£5.

A Ukrainian drone attack has destroyed more than 40 Russian planes deep in Russia’s territory, a Ukrainian security official told The Associated Press on Sunday, while Russia pounded Ukraine with