The Guardian: 'One way in, one way out': why G7 summits are in such remote locations

https://www.theguardian.com/world/2018/jun/09/g7-summit-canada-remote-locations

Security consulting firm Global Risk International: “If you go back to some recent G7 and G20 meetings, the downtown core always gets trashed. What they want to do is zero in on the protesters. If they want to come, they basically have to walk in.”