The Wash. Monument's the most vulnerable building in DC, I would think, and there was some damage to it.
The earthquakes I went through in LA always woke me up early in the morning. The first one felt like I was on a subway car, going back and forth the same way.
The Yucca Flats/Big Bear one (which was a 7.0, but felt much less because it was so far away) was different - I was awakened by my dog and I looked at the clock and found it took over a minute to stop! It was more of a gentle sway. One person had a dish of potpourri in her bathroom - the dish didn't move or break, but the potpourri was all over the floor. Go figure.
We had moved before the big one in Northridge, which toppled our chimney. We went back out a few months afterward to pack up the house for our final move. We had a backyard that had a 6 ft brick wall enclosing three sides. Two of the sides were fine, but the third wall we were told was like Jello after it was hit, and just a touch wobbled the thing.
It's funny, when I was putting up pictures at my new place, my sister-in-law told me to put this big picture over my bed. I refused, remembering what we were taught in LA - NEVER put a mirror, painting, or framed picture over the head of your bed. It's the first thing that crashes down in an earthquake. Glad I remembered, even though luckily this one passed me by. The scary thing here in the East is that buildings are so old, and not built to Western earthquake code, and a shaker could really injure people with toppling facades and towers.