McCain, a Republican senator from Arizona and a U.S. Navy veteran, passed away Saturday at the age of 81 due to brain cancer.
“Whether advancing the cause of freedom across the former Soviet states of eastern Europe or defending the multilateral international order at a time of scepticism, his work was a beacon for all of us who believe that transatlantic unity is the only means of ensuring peace,” the three former NATO secretaries general said of McCain in a letter published Thursday.
Anders Fogh Rasmussen co-wrote the letter with George Robertson and Javier Solana.
The new $1.4B headquarters will accommodate 29 embassies and 4.2K personnel in support of the alliance’s political and administrative operations.
The fiscal 2019 defense authorization bill that President Donald Trump signed into law two weeks ago was named for McCain, who served as chairman of the Senate Armed Services Committee.