Former President Biden completed a course of radiation treatment for prostate cancer. His daughter Ashley posted video on her Instagram showing her 82-year-old father ringing a bell to mark the major milestone at a University of Pennsylvania medical facility. In separate posts, she also thanked his medical team and praised her dad's bravery.Now, back in May, the former president was diagnosed with an aggressive form of prostate cancer that metastasized to his bones. Biden's office says he went through sever ...