American education officials have sought new ways to make schools more secure following several deadly shootings in recent years. One of them took place in February at Marjory Stoneman Douglas High School in Parkland, Florida. The attack, carried out by former student Nikolas Cruz, killed 17 people. The killings set in motion a nationwide debate over school security and gun control. Many security proposals have been discussed, including the hiring of armed guards and putting metal detectors in schools. The principal of Marjory Stoneman Douglas High School, Ty Thompson, recently tweeted about new security measures that will take effect during the new school year beginning next month. Among the changes will be adding four security officers, the addition of metal detectors and numerous new cameras. Some American schools plan to take camera technology a step further by adding facial recognition equipment to improve security. Such systems work by continuously searching faces for the identities of individuals whose images have already been entered.