Dr. John McCarthy discusses crowd counting on Curbed

Published: Jan 17, 2017

From how many people attended President Donald Trump's inauguration to how many protesters filled streets during Women's Marches across the country, people are arguing over the science of crowd counting in our cities.

Click here to read more: http://www.curbed.com/2017/1/24/14357842/crowd-counting-marches-inauguration-protest