Anyone else like to watch air traffic on Flightradar24? This evening, I spotted a 4-engine aircraft without any designated livery ID. It is a Russian-built knockoff of our C-5 Galaxy (only bigger) that departed Indy shortly before 8:00 pm. It flew over my area at 15000 feet and the low roaring whine of the engines sounded like nothing I’ve heard. I can't remember ever seeing this aircraft over the Midwest. I wonder who flew over and picked up/ dropped off what from who.