Hallie Biden, the widow of President Joe Biden's late son Beau Biden, testified in federal court Thursday that she became a drug user after the president's surviving son, Hunter Biden, introduced her to crack cocaine. "It was a terrible experience that I went through and I'm embarrassed and I'm ashamed of that period of my life," Hallie Biden said in Hunter Biden's criminal gun trial in Delaware federal court, NBC News reported. Hallie Biden was romantically involved with Hunter Biden after Beau Biden's death from brain cancer in 2015. She and Hunter were together in October 2018, when he allegedly lied about his drug use to buy a Colt Cobra revolver. Hunter Biden, 54, faces