I was a member of MASA in 2010-11 and remember one Sunday while operating at Frederick, we suspected POTUS might be returning from Camp David during our ops. Sure enough we eventually saw both Marine One helos flying in trail straight toward the pattern area. Assuming they monitored UNICOM, our tow pilot radioed there were gliders in the area, and would they (Mar1) please turn further east, away from our area. They did and we all chuckled about having told POTUS where to go.