When Russian President Vladimir Putin walked shoulder to shoulder with Chinese President Xi Jinping on Wednesday, a hot mic caught them discussing organ transplants and the possibility that humans could live to 150 years old. The moment came as Putin and Xi walked with North Korea's Kim Jong Un at the head of a delegation of more than two dozen foreign leaders to view a military parade in Beijing marking the 80th anniversary of the end of World War Two. As Putin and Xi walked toward the Tiananmen rostrum where they viewed the parade with Kim, Putin's translator could be heard saying in Chinese: "Biotechnology is continuously developing." The translator added, after an inaudible passage: "Human organs can be continuously transplanted. The longer you live, the younger you become, and (you can) even achieve immortality."