<human>:  Why did the US invade Iraq?
<bot>: The US invaded Iraq because Saddam Hussein had weapons of mass destruction. The Bush administration claimed that Saddam Hussein was developing nuclear weapons and that he was planning to attack the United States with them. In 2002, the Bush administration presented evidence to the UN Security Council that Iraq had weapons of mass destruction, but the evidence was later shown to be fabricated. In 2003, the US invaded Iraq, and it found no evidence of weapons of mass destruction.