Terror attack at U.S. soil again

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When will those terrorism stop those nonsense attacks, and isn't it killing innocent people will bring them joy and pleasure? That really define terrorism pure evil instead prove that they had done their GOD's act. Today, a passenger plane landed at JFK airport escorted by two fighter planes, and they seized a package that suspected to be some sort of explosive originated from United Arab. Luckily, no one hurt yet. I just simply don't understand what kind of religion would teach people to kill other innocent people to achieve their justice? Those people have knowledgeable skill on making bombs, why won't they use their skills and knowledge to help develop their own country, and make it prosper instead of doing evil act to destroy lives? I just don't see what would they get after doing all these?