 Complete the following phrase:  A gunman opened fire at Marjory Stoneman Douglas High School in Parkland, Florida, on February 14, 2018. The shooter pulled the fire alarm in order to lure students and staff members out into the hallways, which caused some confusion among students and staff members, because there had been a fire drill earlier that same day, and shortly after the shooting began, a staff member activated a code red lockdown. There was also confusion because of the contradictory instructions coming from the emergency communication system, the fire alarm instructing students to evacuate while the PA system instructed them to lock down and stay where they were. Seventeen students and staff members were killed in the 