CNN — For months, investigators looking into Rudy Giuliani's business dealings in Ukraine have dug into everything from possible financial entanglements with alleged corrupt Ukrainian figures to ...

President Donald Trump frequently paints the Russia investigation as a politically-motivated "witch hunt" meant to delegitimize his victory.

When one of the FBI's top counterintelligence agents was arrested in January 2023 and charged with doing illegal work for sanctioned Russian oligarch Oleg Deripaska, the US national security community ...

In a startling new development that has drawn global attention, a former FBI counterintelligence agent has alleged that Elon Musk—the tech magnate and CEO of Tesla and SpaceX—was specifically targeted ...

*** With a thousand agents, New York was the FBI’s largest field office. “There were about six or seven Soviet squads with maybe 20 or 25 people on each,” says an FBI counterintelligence agent ...

WASHINGTON — U.S. soldiers in 2025 are more likely to face the enemy online than on the battlefield, as American troops are targeted daily by foreign intelligence officers seeking details on weaponry ...

WASHINGTON — Peter Strzok, the FBI senior counterintelligence agent who disparaged President Donald Trump in inflammatory text messages and helped oversee the Hillary Clinton email and Russia ...

May 8 -- FBI officials were told 12 years ago that alleged double agent Katrina Leung was secretly working for the Chinese, an ABCNEWS investigation has found. The case of Leung, an American citizen ...

On Friday, July 9, 2010, FBI special agent Richard DesLauriers disembarked from a chartered Vision Airlines jet on the tarmac of Vienna’s Schwechat International Airport, accompanied by 10 Russian ...