To compete with a merged Delta and Northwest, and forge a strong and stable American airline industry, United and Continental or American and us Airways may be urged to make a similar move.

为了和合并后的三角洲和西北竞争，打造一个强大稳定的美国航空业，联合航空和大陆航空，或者美国航空和全美航空，可能不得不采取同样的策略。

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It included stock in the airline, pay raises, job protections and work rules that three years later would have brought American pilots to a contract indexed to Delta, United and US Airways contracts.

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American has also felt competitive pressures as most of its competitors like Delta, United, US Airways and several similar carriers have reorganized under Chapter 11 Bankruptcy Code in recent years and emerged a stronger competitors as companies have renegotiated labor, supply and financing contracts that have brought operating costs down.

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And PreCheck members flying on United, Delta and US Airways will see notification of PreCheck clearance on boarding passes now.

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