SpaceX founder Elon Musk sparred on Twitter with Tory Bruno, the CEO of Boeing and Lockheed Martin’s rocket-building joint venture United Launch Alliance (ULA), one of SpaceX's competitors, saying ULA would be “dead” without government contracts.
In turn, Tory Bruno has repeatedly said that ULA receiving any government subsidies was a myth.
Earlier, again on Twitter, Elon Musk said that ULA was a "complete waste of taxpayer money".
Both companies, ULA and SpaceX compete against each other in the space industry.