Gee! Like the terrorists couldn't have planted a suspicious package or a true device, and have someone put another true device out in the park? Or a sniper?
What would happen if 100 Senators got offed due to this stupidity?
Maybe this is my executive protection training talking, and over-reacting, but if I was protecting one of these guys, he sure as heck wouldn't be standing on the GD LAWN during a time of war!