Even considering the WaMo as a terrorist target shows how misguided the Government is. Of all the tourist attractions on The Mall this building id the least attractive as a target. Let's look at the scenario: a nut job gets in laden with explosives on a vest. He will detonate it in one of two places: the waiting room at the base or the observation deck at the top. Both places are clausterphobically small. The loss of life would be about 30.
Let's say the detonation is at the top. There's a big, hollywood style BOOM and the mall is bombed with chunks of marble. OK, and.....?
Now, let's say the explosion is in the waiting room in the base. IF the explosion is big enough the monument might fall over. That would result in the deaths of all in the monument and maybe a few outside, but that's it. It falls over and we have a new monument to the fallen.
However, I can walk into the Air & Space Museum with minimal searching. Detonating a nail laden vest of explosives would do WAY more damage.
"Those who would give up a little liberty..." Oh, never mind.