"That becomes a very attractive target to a suicide bomber," Ron said. "The attack in Moscow should draw attention to the need for increased security in these areas."[washingtonpost.com]

I wonder what they imagine Security could do other than move the target area out into the parking lot, or wherever. Suicide bombing is self-limiting because there are very few people whose lives are of so little value to themselves that they are willing to go through with it UNLESS there are environmental factors present that tend to create them faster than they can blow themselves up.