Former President Joe Biden’s prostate cancer has spread to other parts of his body, leaving him in pain, his son Hunter Biden said in an interview broadcast Friday. “It’s metastasized into his bones and further,” Hunter Biden told a BBC journalist. His daughter, Ashley Biden, posted a video of Biden ringing a bell, a tradition that patients perform to mark a major treatment milestone. “He’s still out there,” Hunter Biden said in the interview broadcast Friday. Joe Biden, who has long supported cancer research, has already dealt with family tragedy related to the disease.