Saudi Arabia’s agreement to purchase the S-400 anti-aircraft Triumf anti-missile system from Russia is a major blow to the United States and its European allies. The deal follows Turkey’s $2.5 billion agreement to buy the S-400, and ongoing negotiations with Egypt for the S-400.
(Originally the S-400 was called the S-300 PMU-3.) Among other countries with the S-300 system are Greece, a NATO ally who got them from Cyprus when the …