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In the last line, what did the writer mean by suggesting that “he may have found more porcupines than rats?”

Porcupines are animals have spiky body which can protect them from harm . However , rats are different from porcupines , they quickly run when they see or hear something on the spot,and why the writer said that because they wanted more people to protect these things from other people.What’s worth giving up your life for?To take responsibility to defend the country in case of any bombing or terrorists actions happens all sudden.We have to do and have confidence to do this as we are also part of this country,and anything can happen tomorrow anywhere and anytime.