I took the No 10 bus & Light Rail train out to Seattle-Tacoma airport again this morning, to fly to San Francisco. The airports are still crammed with summer travellers for a few more weeks until it is back-to-school time. A good thing I was flying Alaska Airlines : it was a bad day for Delta Airlines’ operations with a catastrophic failure in its computer system. (From the NBC News website : ‘Tens of thousands of Delta passengers around the world were stranded Monday after a power outage at its Atlanta headquarters caused a global computer failure that halted all flights’.).