It was the first time Joe Biden attended a public event since he announced he had an aggressive form of prostate cancer.

A representative for former U.S. President Joe Biden is revealing new details on his prostate cancer diagnosis. In a statement to NBC News, a spokesperson for Biden, 82, said he received his last Prostate Specific Antigen test in 2014.

Biden was diagnosed following urinary symptoms, one of the most common signs of prostate cancer. That's because it is often detected only when the prostate is big enough to have impacted the urethra, the tube that connects the bladder to the penis.