Congressional Plaza construction update (Photos)

Construction continues on the future Barnes and Noble bookstore, and FITRow, at Congressional Plaza on Rockville Pike. Both the bookstore and the 3-space fitness annex will open in 2020. I can't figure out what they are doing at the B&N space - raising the roof, adding a floor, or just increasing the height of the facade. They have also posted a yellow FITRow sign on the building.