31
Dec
Cape Kennedy (Florida), Dec 31, Elon Musk's private space enterprise SpaceX has launched the US military's most secretive X-37B plan through its hulking Falcon Heavy rocket that returned to the skies. It launched a mysterious spacecraft for the US military on Thursday evening that will carry out cutting-edge research. The rocket lifted off from NASA's Kennedy Space Centre in Florida at 8:07 p.m. ET, carrying the military's uncrewed X-37B space plane that operates autonomously -- to unprecedented altitudes. The launch streamed live on SpaceX's website. The side boosters returned to Earth and safely touched down, media reports said. It is…