SpaceX CEO Elon Musk again tweets a photo of the Moon and calls it Mars

SpaceX's billionaire CEO Elon Musk on Wednesday tweeted a graphic saying 'Occupy Mars' with a picture of the Moon. Nine months ago, Musk had tweeted the same graphic following which several users pointed out the error, to which Musk had responded, "Moon too". However, SpaceX has been selling t-shirts with the same graphic with an actual picture of Mars.