The top image is a map of the San Francisco airport created from Harris Symphony OpsVue radar track data analysis of an an Air Canada flight trying to land on July 7. The bottom image was taken from San Francisco International Airport video.
National Transportation Safety Board
"We lose more than 140,000 people because of events we know how to prevent," Deborah Hersman of the National Safety Council said of the fires, falls and other safety issues her organization found.
Frank Franklin II/AP