>> reporter: the 46-year-old bronze star recipient who served in iraq of first diagnosed in august, 2013. following treatment, he was given a clean bill of health and returned to his work as delaware attorney general just months later. he announced last year that he would not seek a third term as attorney general. instead, planning a run for governor in 2016. >> please join me in welcoming my friend my father my hero the next vice president of the united states, joe biden. >> reporter: biden gave an emotional speech introducing his father at the 2008 democratic national convention and was considered a rising star in the democratic party. just this spring biden suffered a recurrence of the cancer and sought treatment. despite a valiant fight, beau biden died surrounding by his entire family. he's survived by his wife hally, and two children, vice president joe biden and jill biden, and his brother and sister. >> vice president biden released