When they're doing it for political reasons, not always. Blowing up a building gets you plenty of publicity, and it's a lot more positive if no one was killed.

When they're doing it for political reasons, not always. Blowing up a building gets you plenty of publicity, and it's a lot more positive if no one was killed. For example, http://en.wikipedia.org/wiki/Manchester_bombing http://en.wikipedia.org/wiki/Manchester_bombing