Process. Procedure. Same meaning?

From the New York Times – 15 September 2021: “The chairman of the Joint Chiefs of Staff twice called his Chinese counterpart in the final months of the Trump administration to reassure him that Donald J. Trump had no plans to attack China in an effort to remain in power and that the United States was not collapsing, according to ‘Peril,’ a new book by the Washington Post reporters Bob Woodward and Robert Costa.”

The NYTimes continued: “After speaking to Ms. Pelosi, General Milley convened a meeting in a war room at the Pentagon with the military’s top commanders, telling them that he wanted to go over the longstanding procedures for launching a nuclear weapon. The general reminded the commanders that only the president could order such a strike and that General Milley needed to be directly involved.

‘If you get calls,’ General Milley said, ‘no matter who they’re from, there’s a process here, there’s a procedure. No matter what you’re told, you do the procedure. You do the process. And I’m part of that procedure. You’ve got to make sure that the right people are on the net.’

The general added: ‘The strict procedures are explicitly designed to avoid inadvertent mistakes or accident or nefarious, unintentional, illegal, immoral, unethical launching of the world’s most dangerous weapons.’

Then, he went around the room and asked each officer to confirm that they understood what he was saying.”

But, wait, how does General Milley distinguish between what is a process and what is a procedure? They are not the same.