WASHINGTON (AP) — President Donald Trump said Thursday that an attack on Syria could take place "very soon or not so soon at all," arguing he had never signaled the timing of retaliation for a suspected chemical weapons attack that he had suggested was imminent a day earlier.The president made his latest statement in a tweet Thursday morning. Trump on Wednesday had warned Russia to "get ready" for a missile attack on its ally Syria. But on Thursday, Trump tweeted: "Never said when an attack on Syria would take place."