Ask The Pilot does a good job reviewing the details of the KLM-Pan Am collision that killed 583 people 30 years ago last week in Tenerife, Canary Islands. You can read the article for all the details, but a freakish series of events took place that led to the KLM 747 heading down the runway while the Pan Am 747 was still on it. Incredibly, all 5 people in the Pan Am cockpit survived, and Patrick Smith, who wrote the column, interviewed one of them. It’s an amazing story. To learn more, you can check out this site that has links to photos, transcripts and a full report. It’s a fascinating read.