Here is a short (26 second) piece from NPR last week.
Apparently some male controllers are protesting the (absurd) new dress code which bans shorts, jeans and tee shirts by wearing skirts!
And a link to today's somewhat lengthier piece which makes reference to this amongst other work rules:
Air-Traffic Controllers Show Odd Protests, NPR 6 July 2007
[Edited 2007-07-07 04:06:03]