Article continues below advertisementDid Donald Trump and Elon Musk finally put their feud to rest?On Sunday, September 21, the president and the Tesla billionaire were spotted side by side at Charlie Kirk's memorial service, held at a packed sports stadium in Arizona. Cameras caught the two shaking hands as Musk sat down next to Trump during a break between speeches.Article continues below advertisementLip reader Nicola Hickling shared with an outlet what appeared to be said in the brief but telling exchange. While clapping, Trump tapped Musk's knee and told him, "All good.