An image of a proposed spacecraft jointly developed by PD Aerospace Ltd., ANA Holdings Inc. and H.I.S. Co. is displayed on a screen during a news conference in Tokyo, Japan, on Thursday, Dec. 1, 2016. ANA invested in PD Aerospace, a Japanese company developing a craft to take people into space as early as 2023 that aims to be a potential rival to Richard Branson's Virgin Galactic Ltd. Photographer: Yuriko Nakao/Bloomberg via Getty Images