A heated exchange occurred between Acting Secret Service Director Ronald Rowe and Republican Texas Congressman Pat Fallon during a House panel investigating the assassination attempt against President-elect Donald Trump.Fallon accused Rowe of putting the President's Secret Service detail out of position so he could sit behind Trump during a 9/11 memorial ceremony.Rowe defended himself, stating he was at Ground Zero on 9/11 and responded to the World Trade Center.Fallon accused Rowe of using the 9/11 event for political purposes. Rowe denied Fallon's accusations and stated he was showing respect for those who died on 9/11.The Secret Service has made changes to ensure the assassination attempt doesn't happen again, with a focus on heightened protection, training, and accountability.