The Times of Israel reports: For years, Israel was without rival in the skies over the Middle East, but with the Russian military placing an advanced anti-aircraft system — the S-400 — in Syria, that dynamic has changed and turned the once open skies into a far more difficult space to navigate, according to a senior Israeli Air Force official.

“We’re living in interesting times,” the officer told reporters Sunday night, speaking on condition of anonymity.

The Syrian civil war, which has ravaged the country over the past five years, has become something of an international free-for-all, with not only hundreds of local militias, but nations from all over the world taking part in the fighting.