At a NATO summit on Wednesday, President Trump said the U.S. had 'dealt a heavy blow' to Iran overnight, warned further strikes could follow that night, and announced the U.S. ceasefire with Iran is over after Iran attacked a merchant vessel near the Strait of Hormuz. He said he remains willing to continue negotiations but accused Iranian leaders of repeatedly agreeing to terms then reneging, called them 'cuckoo,' and said he is considering additional attacks as soon as Wednesday night.