The two American astronauts who have been stranded in the International Space Station for more than 9 months have finally embarked on their journey back to Earth. Their long 'space drift' has attracted widespread attention from media and netizens around the world. Musk, the founder of the American SpaceX company, who had previously proposed to use the 'Dragon' spacecraft to bring them back but was once rejected by NASA, stated in an interview that the reason for the astronauts' delayed return is 'political factors'. (CCTV International News)