About a year ago (I think) parked at DTW off to the side of 21L/3R - from the roof of the McNamara garage. Not too close.
Off topic, but passed Clinton's motorcade on I-94 in Macomb County, MI one time - probably heading to Selfridge. I could not figure out why there was no eastbound traffic (I was westbound) until I saw the limos, SUVs, police,... Funny part was that when they released the stopped traffic behind the motorcade, the first two vehicles were a school bus and beer truck - made me think of the scene from Airplane!