Russia has brought out its S-500, an 'experimental' weapon it's never used before, Ukrainian spy chief says as Ukraine hunts air defenses in Crimea

• Russia deployed its only S-500 air defense system in Crimea amid Ukrainian strikes.
• The system is "experimental," Ukraine's spy chief said, and has never been used before in combat.
• Ukraine has upped its attacks in Crimea, likely hoping to destroy Russia's air defenses in the area.

Russia has deployed its only S-500 air defense system in Crimea as Ukraine ups its attacks on the occupied peninsula, Ukraine's spy chief said this week.

The S-500, an advanced system described by Lt. Gen. Kyrylo Budanov, head of the Ukrainian Defense Intelligence Directorate as "experimental," has never been used in combat before.