With Iraq we believed that they were still hoarding WMD's that they had from the 1980's. As we now know, that turned out to not be the case, and they actually did destroy them. Before the war, it was reported by most media outlets that WMD's were still in Iraq. Then you had the UN weapons inspectors who kept being thrown out of Iraq. If the weapons inspectors had been allowed to remain and do their job, there wouldn't have been a second Iraq war.