It's politically volatile territory, so someone cue up the vice president for a joke. During a barbecue today at the Walter Reed Medical Center, Joe Biden just couldn't help himself, reports the Hill. "I didn't serve in Vietnam. I don't want to make a Blumenthal mistake here," he told veterans. "Our attorney general from Connecticut, God love him." He later added, "I have a bad habit of saying exactly what I think." (More Joe Biden stories.)