Tanya Ballard Brown

Updated at 6:50 p.m. ET

Florida Gov. Rick Scott has signed legislation tightening gun restrictions in the state. Among other things, the legislation raises the legal age for gun purchases to 21, institutes a waiting period of three days, and allows for the arming of school personnel who are not full-time teachers.

In a statement, Scott's office highlights mental health provisions in the bill:

Last updated July 10, 9:23 a.m. ET

People across the country joined protests and held vigils late this week, following two highly publicized police shootings in Louisiana and Minnesota. As those incidents dominated headlines and social media, a sniper targeted law enforcement at a peaceful protest in Dallas, killing five police officers and shocking the nation.

With the verdict looming in the trial of George Zimmerman, who's charged in the 2012 shooting death of 17-year-old Trayvon Martin, suddenly speculation has turned to this: the possibility of angry protesters turning to violence if the outcome isn't the one they envisioned.