This section profiles U.S. government officials who led or oversaw the response to Russian intelligence activity, particularly the investigation of Russian interference in the 2016 presidential election. They include the heads of the intelligence community who produced the January 2017 Intelligence Community Assessment on Russian interference, senior Justice Department and FBI officials involved in the counterintelligence investigation known as Crossfire Hurricane, the federal prosecutor whose office brought major Russia-related cases in New York, and Special Counsel Robert Mueller, whose office indicted GRU officers and Internet Research Agency employees in 2018.