Another thing to point out is Delta may have told them SLC. Thing change daily.. Example. They told SKW xxx amount of flying out of MSP. So they planed having xx of crews there for the summer. Then at the last min Delta says can you take 2000 block hrs out of DTW... And of course the answer is yes... And now there short... And no crew base, and have to build trips with DH's and flow through cities....