More on the sleeping air traffic controllers, the headline on this piece read

Odd Work Schedules Pose Health Risk.  (note the employment of the word odd, which seems an odd choice of word to describe a nightshift, since there’s relatively little that’s “odd” about working nights, it’s standard for many jobs. Cities could not function without night workers.)

“Reports of sleeping air traffic controllers highlight a long-known and often ignored hazard: Workers on night shifts can have trouble concentrating and even staying awake.” Read rest here