Pictured: Moment when Air Canada jet almost caused 'greatest aviation disaster in history' in San Francisco

Newly released data and photos show how shockingly low an Air Canada jet was when it pulled up to avoid crashing into planes waiting on a San Francisco International Airport taxiway last month. The Air Canada pilots mistook the taxiway for the runway next to it and flew their jet to just 59 feet (18 meters) above ground before pulling up to attempt another landing, according to National Transportation Safety Board information released on Wednesday.That's barely