Tenerife, the worst accident in aviation history; like all pilots, Captain Van Zanten's decision to go for the take-off was only one of the many thousands of decisions he had made in his career. Rain, snow or fog obscuring the view of the entire runway was not uncommon and something he had experienced many times. <br><br>He was thinking about many things; the delays, his inconvenienced passengers, the schedule, and the flight legs facing him after dropping his passengers just...