KYIV, March 5 (Reuters) - President Volodymyr Zelenskiy said on Thursday that Ukraine would provide assistance to the U.S. in response to its request for help in dealing with Iranian drones in the Middle East.Tehran has fired hundreds of drones at U.S. targets in neighboring countries after the U.S. and Israel began a massive campaign of air strikes against Iran on Saturday. During its war with Russia, Ukraine has developed highly effective means of downing the Iranian-designed Shahed kamikaze...