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"Delta Air Lines says it is has grounded flights after experiencing unspecified systems issues. Confirmation of the troubles Monday came in tweets to its customers. The airline declined to immediately comment. A typical response to Delta's customers complaining about their service was: \"Our systems are down everywhere. Hopefully it won't be much longer.\""^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.wjcl.com/article/delta-grounds-all-flights/1015417>