https://newatlas.com/raytheon-nrthrop-grumman-hypersonic-air-breathing-missile-agreement/60203/

At the Paris Air Show, Raytheon and Northrop Grumman announced they have formally agreed to collaborate on building an air-breathing hypersonic weapon for DARPA and the US Air Force. Under the new partnership, the two companies will develop, produce, and integrate scramjet combustors built by Northrop into Raytheon's hypersonic tactical missiles.