"The radiation treatment from last fall worked as intended." Former President Joe Biden shares an update on his battle with Stage 4 prostate cancer, saying he continues doing the things he cares about as he urges other men not to put off conversations about screening. "Talk to your doctors. Ask the hard questions. Do it for yourself, and do it for the people who love you," Biden said. He was diagnosed last year with an aggressive form of prostate cancer that had spread to his bones.