Sure, a terrorist's goal is to create terror. But a higher body count is by far the most reliable way to generate more terror. Sure, a few people killed in a particularly gruesome way might create more terror than a numerically larger event. But only by a moderate factor. I highly doubt 10 people killed by a plane crashing into a dry storage site would leave a greater impression than a hundred killed by crashing into an occupied building. And a 10:1 ratio is probably generous towards the number killed by the attack on the waste storage. For the most part, these concrete cylinders sit still with few, if any, people around them: https://blogs-images.forbes.com/jamesconca/files/2018/03/ENW...