I was mostly referring to how Iraq after 9/11 was repeatedly claimed to have WMDs. This was done to justify a war, which was obviously
actually about oil.
US intelligence agencies time and time again claimed to posses evidence of Iraq having WMDs, and how it was vital to invade to stop Saddam from using them.
After the invasion it was obvious to pretty much everyone that the WMDs weren't there, they had been deliberately lied to, and that the "evidence" was manufactured.
I remember even Colin Powell being furious about this, seeing as he was the one who stood in front of the UN presenting the "evidence" as fact. A massive loss of face. He was not happy.