After her 2002 loss, McKinney traveled and gave speeches, and served as a commissioner in 9/11 Citizens Watch. On October 26, 2004, she was among 100 Americans and 40 family members of those who were killed on 9/11 who signed the 9/11 Truth Movement statement, calling for new investigations into unexplained aspects of the 9/11 events. McKinney was re-elected to the House in November 2004, following her successor's run for Senate. In Congress, she unsuccessfully tried to unseal FBI records on the assassination of Martin Luther King Jr. and the murder of Tupac Shakur. She continued to criticize the Bush Administration over the 9/11 attacks. She supported anti-war legislation and introduced articles of impeachment against President Bush, Vice President Dick Cheney, and Secretary of State Condoleezza Rice.