From the article you posted;As Smallcock mentioned, government agencies also claimed Saddam had WMDs.
https://www.cia.gov/news-information/speeches-testimony/2004/tenet_georgetownspeech_02052004.html
"Let’s start with missile and other delivery systems for WMD. Our community said with high confidence that Saddam was continuing and expanding his missile programs contrary to UN resolutions"
Not just confidence, but HIGH confidence. lol
http://www.huffingtonpost.com/2013/03/15/iraq-wmd-legacy-us-intelligence-iran_n_2883027.html
In the run-up to the invasion of Iraq 10 years ago, the CIA and other intelligence services confidently asserted that Saddam Hussein’s regime had stockpiles of weapons of mass destruction
Since that humiliating episode, the country’s 16 spy services have sought to bolster intelligence-gathering efforts around the world and added vetting procedures to their analysis to avoid any repeat of the Iraq experience, former CIA officials and analysts said.
“Lessons have been learned,” said Paul Pillar, a former senior CIA analyst who oversaw intelligence on the Middle East.