FILE - In this Jan. 30, 2010, file photo, Vice President Joe Biden, left, with his son Hunter, right, at the Duke Georgetown NCAA college basketball game in Washington. Hunter Biden is expressing regret for being discharged from the Navy Reserve amid published reports that he tested positive for cocaine. The Wall Street Journal reports that Hunter Biden failed the drug test last year and was discharged in February. In a statement issued Thursday, Oct. 16, Biden doesn't say why he was discharged. He says he's embarrassed that his actions led to his discharge and that he respects the Navy's decision. The vice president's office declined to comment.(AP Photo/Nick Wass, File)