I ended up just walking through the Mall. Not much time to do much at the Smithsonian - something about having too much fun yakking at lunch
I did go up to the top of the old post office tower to look around.
My phone ran out of 'juice,' so I couldn't even access Dottie's phone number - so we didn't end up connecting (my one dark spot to the day

)
And I did end up returning at 8pm. I just decided I'd rather save the exploration til I can share it with my TinMan.