Tens of thousands of dragons (as big as B2 bomber and top speed clocking at Mark 0.5) mysteriously appears above New York City. They are docile in nature, but these creatures pose a serious threat to our modern technology. Their bodies glow in X-ray. Also, every second, their body emits powerful electromagnetic pulses. The frequency of the pulses varies and could only be block by an ideal Faraday cage that could never exist in reality. Miraculously, the dragons themselves are not affected by these emissions. Unless we do something, their presence will disable electronic circuitry and sterilize anything within close proximity of 100m radius. Note the dragons will turn aggressive when provoked (easily detected when they begin to salivate fluoroantimonic acids...).
How can New York defend against such creatures?