It's considered the workhorse of space - but now the Falcon 9 rocket has been grounded by US regulators. The entire fleet has been grounded after a booster exploded on touchdown. Watch 10’s Late News weeknights at 10pm AEST. Subscribe to 10 News First to get the latest updates and breaking news: https://bit.ly/37DDbL1 Join the conversation and follow us on: Twitter: http://twitter.com/10NewsFirst Facebook: http://www.facebook.com/10NewsFirst/ Instagram: http://www.instagram.com/10NewsFirst/ TikTok: https://www.tiktok.com/@10newsfirst 10 News First airs at 5 pm, seven nights a week in your local market on Network 10. Missed the bulletin? Catch up at https://10play.com.au/news 10 News First is based in Australia and is a division of Paramount.