Why Aren't There More Helicopter Crashes In London?

http://tomscott.com - @tomscott - Helicopters in London have a simple rule that means they're safer for everyone in the city. I stand on something a bit too high in order to explain it.

• #education
• #tom_scott
• #tomscott
• #things_you_might_not_know
• #helicopter
• #st_george_wharf_tower
• #2013_vauxhall_helicopter_crash
• #aviation_accident_or_incident_nci_term
• #river_thames
• #london