No such event or agreement ever took place. #Sarotte determined this by looking through archives of #RUSSIAN documents. As well as #US archives. And speaking with the players, including #Gorbachev and then Secretary of State #JimBaker.

It had been archived at the wayback machine, repeatedly all the way back to 2014. However, I just checked and all archive records prior to the Foreign Affairs paywall having been introduced have NOW BEEN REMOVED.