Live Coverage: NYPD given permission to enter Columbia University

An alert sent from the school Tuesday urged students on the Morningside campus to "shelter in place for your safety due to heightened activity" and "avoid the area until further notice." Read more: https://cbsloc.al/3WoC3q8 Subscribe Here: http://www.youtube.com/user/cbsnewyork Official Site: http://newyork.cbslocal.com/ Twitter: https://twitter.com/CBSnewyork Facebook: https://www.facebook.com/CBSNewYork