Lunch breaks are the best time of the day. Workers get to rest and stuff their faces and employers don't have to pay them for that time -- so long as the break is about 30 minutes or more. Cut into that time, however, and you no longer have a lunch, you just have a rest, even if workers were able to chow down between tasks.
Take, for example, the naval base security guards who had their lunch breaks eroded by travel requirements. Since their employer required them to leave their post to eat, their lunch breaks were too short to be automatically exempt from pay under the Fair Labor Standard Acts, the Fifth Circuit ruled recently.