What is at/under this museum? That would attract them?
Maybe it is the Spirit of St Louis or perhaps the flight simulators that are setting these nuts off. But it would be really funny if they are after the Enola Gay that is on display at the Dulles museum and safe from anyone who do not have access to an automobile.
I remember a day way back when. We came and went from the museums as we pleased. We jogged around the mall and stopped to pay our respects at Vietnam memorial wall. Late at night dating couples could actually walk up the steps to the Capitol and sit there as long as we liked. We felt safe since the capitol police were all over the place. I am so grateful to God that I experienced that time.