MAKING GOOD ON A THREAT: The Pentagon announced late yesterday it is suspending all “deliveries and activities” associated with Turkey’s acquisition of F-35 Joint Strike Fighters unless and until the NATO ally reverses its decision to buy an advanced Russian air defense system that the United States says would compromise the F-35’s advanced stealth features.

U.S. officials have been warning Turkish President Recep Tayyip Erdogan for more than a year that purchasing S-400 anti-aircraft missiles would force the United States to end Turkey’s participation in the program.