Secret Service Changed Safety Protocol a Few Weeks Before Florida School Shooting

Secret Service Changed Safety Protocol a Few Weeks Before Florida School Shooting | 15 Feb 2018 | Jalen Martin, a student [senior] at Marjory Stoneman Douglas High School in Parkland, Florida, claims that Secret Service agents visited his school a few weeks before the mass shooting unfolded yesterday. [Also, Martin notes the presence of three video cameras in each stairwell of the two exits. Within each hallway on each floor, there are two cameras. Did all of the cameras 'malfunction,' as they did during the 7/7 Tube attacks in London?]