Found this on the forums on Airliners.NET
for those who weren't listening to the DTW Feed... on Saturday
"(11:30) ATC: We're going...D T W tower is going to A T C zero. Uh, they were doing some work on mold and they did some spraying that is sickening people. So we're going to hold at all four sixes now and trying to determine what we'll be able to do as far as accepting after that. Alright?"
It's an interesting read... and it's in the liveatc.net audio archives supposedly..... going to search the archives to listen to it.
read Lincoln's post five posts down..
post is here:http://www.airliners.net/discussions/general_aviation/read.main/1919568/