A Bonus Chinook

As I was heading back to the car, I heard the distinctive sound of a helicopter.  So I had to swap out lenses to catch it.

 Turns out it was a Chinook.  It seems like I've been seeing this helicopter a fair amount lately.  I think she comes out of Selfridge.

 Still, she's a pretty cool looking helicopter.

And she moves on.  I had a brief chance to catch her later but I wasn't ready with my lenses.