Have there been -- is there any attempt to sort of build these private bridges, as opposed to having these large public events?

WHITEHOUSE: Press Briefing

At least one company has begun marketing mobile drone command vans for police use that could be used at large public events such as the marathon and has been used at the Rose Bowl in past years and during the aftermath of Hurricane Katrina.

CENTERFORSECURITYPOLICY: UAVs and the Boston Marathon

Temporary flight restrictions also apply near nuclear sites and large public outdoor and sporting events such as the World Series.

CNN: Airports inconsistent on security, officials say

Catering to the public at large, it reported on events both domestic and international (e.g. there was much interest in the French Revolution).

FORBES: We Must Stop Treating the President As Our Savior

Aircraft are also banned from flying near professional and collegiate athletic events and other large, outdoor public gatherings.

CNN: FAA lifts some restrictions on small aircraft

The committee also criticised the ticketing system used for the London Olympics, which saw the public unable to buy a large proportion of tickets for major events.

BBC: MPs warn on London 2012 volunteering legacy