Just in the interest of completeness:
Departing flight NW1412 had smoke in the cabin about 30 mins out from DTW and had to return to DTW about 6 PM ET that same Saturday.http://www.liveatc.net/.archive/kdtw/KDTW-Aug-20-05-1800.mp3
20 mins into it NW1412 gets its landing clearence and requests Fire and Rescue to meet them. No injuries and the smoke cleared when they turned off the A/C.
Also not related to the strike I'm sure.
Probably even less interesting than the first one, but what the heck.