American Airlines says computer glitch allowed all pilots to take Xmas vacation
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"In a post to its website, the union warned its members that because "management unilaterally created their solution in violation of the contract, neither APA nor the contract can guarantee the promised payment of the premium being offered."
[0] https://www.npr.org/sections/thetwo-way/2017/11/29/567286235...
Unrelated; "Unions upset about not being able to work" seems to contradict the anti-union sentiment that they just protect crappy employees