To answer the question on how the Iron Dome failed is:
Swarms of cheap drones that the super-duper expensive (PAtriOt) batteries emptied themselves out at. Once the batteries started shooting, they emitted radiation and lit up like Christmas trees to infra-red sensors that were prolly flying higher up. Now the Iranians know everything. Note also that there were no casualties. This is not due to the amazing Israeli defenses, but because there is a fine line in the game of escalation dominance, which the Iranians have learned to play through necessity, after many years of foreign infiltration, military aggression and posturing.
To answer the question on how the Iron Dome failed is:
Swarms of cheap drones that the super-duper expensive (PAtriOt) batteries emptied themselves out at. Once the batteries started shooting, they emitted radiation and lit up like Christmas trees to infra-red sensors that were prolly flying higher up. Now the Iranians know everything. Note also that there were no casualties. This is not due to the amazing Israeli defenses, but because there is a fine line in the game of escalation dominance, which the Iranians have learned to play through necessity, after many years of foreign infiltration, military aggression and posturing.