The ceasefire agreed between Washington and Tehran in mid-June was now "over", he declared.But there were multiple other significant geopolitical developments agreed upon, including tens of billions of dollars in increased defence spending from European nations and a big win for Ukraine's ability to protect itself from Russia's attacks.Here are the main takeaways.Mr Trump has on multiple occasions threatened to pull the US out of NATO, saying other nations (particularly European allies) have been taking advantage of his country.Among his main gripes are that many NATO nations do not spend enough on defence They're led by sick people."At the time that deal was agreed, analysts warned it left the most contentious issues unresolved.Later on Wednesday, Mr Trump hinted that the US military would probably strike targets in Iran "hard" on Wednesday evening.He reiterated on several occasions that Iran "could never have a nuclear weapon".Mr Trump also caused a stir when he reiterated his position that Greenland, a semi-autonomous territory of Denmark between the Arctic and Atlantic oceans, should be controlled by the US.He said the US needed it to stop ships from Russia and China