On March 27, 1977, on the island of Tenerife in the Canary Islands, two fully loaded 747 jumbo jets collided on a fogbound runway, killing 583 people in what is still the deadliest crash in aviation history. NOVA looks back at the crucial final hours... (more) before the disaster. Despite new technology to improve runway safety, near-misses on the ground are still the leading cause of deadly aviation accidents.

Bruce Van Barthold, Gregory Reznick, Joseph Rezwin, Michael Hofland, Mike Dineen, Nicholas Mead, Paul Bandey, Randall Holden