21.   According to the airline, they carried out similar acts last summer during the contract impasse with United pilots that caused thousands of cancellations.

22.   But the airline said mechanics carried out similar acts last summer during a contract impasse with United pilots that caused thousands of cancellations.

23.   Many United pilots have been refusing to work overtime because of a lack of progress in contract negotiations.

24.   United claims they carried out similar acts last summer during the contract impasse with United pilots that caused thousands of cancellations.

25.   While the law allows airline employees to picket, union spokesman Hunter said there are no plans for United pilots to do so at this point.

26.   United pilots had been seeking the employee buyout for seven years, but the deal has not been without its employee opponents.