Observed from my 15th floor condo 4 miles from pentagon a large object in the west sky on february 12th at 6pm. it looked like a large aquatic like mammal with flippers or wings, dark in color slowly rotating in the sky. it rotated to the side facing in the direction of the pentagon. when i took pictures i captured about 7 or 8 glowing white objects that took on different shapes and separated. not sure how long show lasted, probably about two hours because i stopped watching.