I would think many. Just did an hnsearch and came up with this comment from almost two years ago: "Yet another way to look at it. As a terrorist you are tryin

I would think many. Just did an hnsearch and came up with this comment from almost two years ago: "Yet another way to look at it. As a terrorist you are trying to instill terror and kill as many people as possible. A large gathering of people would maximize your impact. I wonder what places and events consistently create large queues of people waiting in line? What about also a place that would cripple and disrupt the economy and travel? I'll leave that as a rhetorical question." https://news.ycombinator.com/item?id=3461183 https://news.ycombinator.com/item?id=3461183