WASHINGTON President Donald Trump said on Monday that the US is learning"much" from a deadly blast during a Russian missile test that caused elevated radiation levels.
"The United States is learning much from the failed missile explosion in Russia. We have similar, though more advanced, technology," Mr Trump tweeted. "The Russian 'Skyfall' explosion has people worried about the air around the facility, and far beyond. Not good!" Experts have linked the blast - which killed at least five people - to the 9M730 Burevestnik nuclear-powered cruise missile, known by Nato as SSC-X-9 Skyfall and touted by President Vladimir Putin earlier this year.
Mr Trump's assertion that the US had similar technology was challenged by American expert Joe Cirincione.