Sophisticated expensive air defense system can be outfoxed and overwhelmed

 The expensive and sophisticated air defense system can be outfoxed  and confused by the enemy.  As in the case of Israel Iron dome vs Hamas 5,000 missile attack.   And the cost benefit comparison is unbalanced.  The Hamas spends only so little on their home made crude missile.  But the air defense system cost?  And Uncle Sam shouldered part of the cost with the military aid to Israel.

In the recent attack, we do not actually know how many of the missile launched by Iran vs Israel were successfully destroyed.    But US definitely with its battle group, and little help from UK and France saved the day for Israel.

Even the air defense of Russia at Ukraine is vulnerable    Failure of Russian air defense system failure