North Korea's leader Kim Jong Un is likely patting himself on the back today.
President Trump in his first term mulled bombing North Korea's nuclear sites after the country tested missiles that can reach the continental US. Ultimately Washington chose diplomacy over military strikes.
It was understood that the US couldn't risk attacking a country who had already demonstrated it had working nuclear bombs.
Iran gave up its enriched uranium after the 2015 deal with the US and Europe. Trump's spy chief Tulsi Gabbard said in March that Iran was not building nuclear weapons.
After today's strike, future adversaries of the US may believe that North Korea calculated correctly.