1.   Because many of its pilots have declined to fly voluntary overtime, Delta said it was forced to cancel hundreds of flights, stranding thousands of passengers.

2.   ALPA and Delta are in contract talks, and some pilots are declining to work voluntary overtime, which the airline relies on to fill out its schedule.

3.   Delta blamed a high number of flight cancellations recently on pilots declining to accept voluntary overtime, which union officials hotly deny.

4.   Delta claims some pilots are declining voluntary overtime, crippling its ability to run a normal schedule.

5.   For the past two weeks, union leaders had debated asking members to refuse to fly voluntary overtime if an agreement with the company could not be reached.

6.   Ford and Chrysler already rely on voluntary overtime.

7.   Some Delta pilots are declining voluntary overtime assignments in what the company contends is an illegal campaign to protest ongoing contract negotiations.

8.   Some referred to moves by United Airlines pilots, who also declined voluntary overtime this summer while in contract negotiations.

9.   That offer could influence whether the increase in voluntary overtime continues.

10.   The airline claims pilots have been declining to work the usual amount of voluntary overtime, leading to many cancellations.