Australia’s largest airline by fleet size Qantas (QABSY), needed to reschedule flights on the Sydney-Johannesburg route recently amid he U.S. communications “regarding the re-entry of SpaceX rockets over a part of the southern Indian Ocean,” the Australia-based carrier said Tuesday, according to Reuters. Elon Musk’s space technology firm SpaceX is a privately-funded rocket manufacturer and transport services company. Also known as Space Exploration Technologies, it was founded by Elon Musk of Tesla (TSLA).