And future events might just get preemptive eye-in-the-sky venue monitoring, via a system like... http://www.theverge.com/2013/2/1/3940898/darpa-gigapixel-dron

And future events might just get preemptive eye-in-the-sky venue monitoring, via a system like... http://www.theverge.com/2013/2/1/3940898/darpa-gigapixel-drone-surveillance-camera-revealed http://www.theverge.com/2013/2/1/3940898/darpa-gigapixel-dro... ...that makes post hoc tracing of proximate suspects more amenable to computer-vision-automation.