Bill had put in seventeen flying hours on that day alone.

Most weeks, he put in 67 hours a week cleaning the machinery, often working months at a time without a day off.

He'd put in twelve hours on a hot day when it happened.

"You don't put in four hours a day and get nothing out of it."

The volunteers put in eight hours of work a day, with an hour for lunch.

On average they could put in 57 hours a week without feeling such a conflict.

Before long, he was putting in 40 hours a week and growing resentful about having to go to class.

Both put in 40 hours a week - and sometimes more - but they are not complaining.

The result has been 4,000 to 6,000 "free" workers, each putting in 28 hours a week.

"It was tougher going through this than putting the major league staff together in 72 hours."