Speculation mounts over Russian President Vladimir Putin's next move, following strikes on Russia's strategic bomber fleet.

President Donald Trump said Wednesday that Vladimir Putin intends to retaliate “very strongly” against Ukraine for a surprise drone strike on Russian airfields over the weekend, a declaration that provoked alarm in Washington and abroad even as Trump touted his efforts to bring peace to the region.

Trump said his latest call with Putin wouldn't lead to "immediate peace" as he relayed the Russian leader's plans to retaliate against Ukraine.