S-400

Russia's S-400 is broadly comparable to the U.S. Patriot system operating in Ukraine.

Kyiv says it destroyed the air-defense system, along with a number of missiles, and killed or injured Russian personnel in the strike.

A Russian S-400 air defense battery in Crimea, along with its missiles and crew was "completely destroyed," Ukraine said on Wednesday.

The Russian S-400 system is "exactly the sort of equipment that HIMARS would be used to target," a military expert told Newsweek.

The 33-year-old who crashed the air defense system failed a breathalyzer test, according to a Russian Telegram channel.

A top aide to Turkey's leading opposition candidate told Newsweek the challenger is "determined" to repair frayed bilateral relations with Washington, D.C.

The missiles offer Russia a more versatile defense option against the inexpensive munitions that have become commonplace in the current conflict.

NASAMS and the S-400 are both utilized to deter threats from aircraft and unmanned aerial vehicles.

It is increasingly apparent that the largest and fastest rising threat to stability and peace in the Middle East is Turkey.

The U.S. kicked Turkey out of its F-35 stealth jet program last year, fearing Ankara's adoption of Russian anti-aircraft technology might allow Moscow to gather intelligence on the fighter plane.

The U.S. has unsuccessfully pressed other nations to extend a United Nations arms embargo on Iran which is due to expire in mid-October.

The president previously described a construction project in Istanbul as "a little conflict of interest" in his dealings with Turkey.

Turkey began radar testing of its Russian-made S-400 anti-aircraft system on Monday, the purchase of which has created friction with Washington.

Relations between NATO allies the U.S. and Turkey have been strained by Ankara's decision to purchase the Russian-made S-400 anti-aircraft system.

Turkey's purchase of the Russian anti-aircraft system has opened up a rift with the U.S., which fears the deal could compromise American military secrets.

Washington's demand that Turkey kill a deal for Russia's S-400 anti-aircraft system was "unacceptable," a Kremlin spokesman said.

The S-400 system is considered the most advanced in the world.

"Any effort by the Government of the Republic of Turkey to further enhance their relationship with Russia will degrade the general security of the NATO alliance."

The Russian S-400 system is effective against stealth aircraft, ballistic missiles and cruise missiles.

Moscow is studying the remains of Tomahawk rockets to exploit their weaknesses.

Air Force Secretary Heather Wilson said U.S. JSTARS command and control planes would not survive initial contact with Russian and Chinese defenses.

The Israeli prime minister is in Moscow to discuss ties with Russia and celebrate the defeat of Nazi Germany.

Moscow has repeatedly hinted it could send some of its most advanced air defense systems to Syria.

The world's top two military powers may be on a collision course in Syria.

Russia has bolstered its air defenses in Syria, but shooting down a U.S. cruise missile is a sophisticated task that will put Putin's military to the test.

Defense experts have warned that the U.S. must upgrade its artillery forces.

The U.S. has threatened to impose sanctions on Turkey in a bid to stop it buying the S-400 from Russia.

China, Egypt, India, Iraq, Saudi Arabia, Sudan, Syria and Turkey were among those looking to get their hands on the S-400 missile defense system.

As Russia consolidates its position in Syria and the Middle East as a whole, it's reaching out to rivals and selling them a coveted weapon, the S-400.

Turkey boasts the second largest army in NATO but its government is growing ever closer to Russia.