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One of the basic technologies that enables what we often refer to as the Internet of Things is embedded Linux, a version of Linux that runs on machines that aren't computers in the traditional sense. A lot of the new "smart" devices joining Wi-Fi networks in the home and office are running some variant of it, as do a lot of those home-Wi-Fi routers themselves. Researchers at security-software company Symantec say they've found a worm that proves that, eventually, these devices may be ripe for attack. It's called Linux.Darlloz, and it appears to have been built to infect versions of Linux found in home routers, TV set-top boxes and security cameras, and also some industrial-control systems.

The switch was thrown quietly in May 2012, hidden inside a 16-page directive, "Gang Violence Reduction Strategy," and largely ignored amid a 60 percent rise in murders in the first quarter alone. With less than a year on the job, McCarthy had already disbanded two special task forces, roving teams that muscled neighborhoods into submission. Now he was betting on what he calls "the next phase of community policing in this world": an emphasis not on the traditional "hot spots" for crime, but on the "hot people" who commit most criminal acts.

Advancing technology affords police departments the opportunity to make their operations faster and more effective. Some departments are exploring using cloud computing-data stored securely on a third-party system that is accessible instantly across remote locations-to provide digital evidence storage. Although traditional bunkers are still needed to protect physical evidence, the proliferation of digital videos, photos and other records can be easily stored on the cloud to the advantage of law enforcement agencies.

Law enforcement agencies depend on new technology to help them ensure public safety. One such innovation is virtual firearms training, a practice facility that replaces traditional guns with digital ones. Several agencies across the U.S. are exploring use of virtual firearms training to save costs, increase efficiency and flexibility, and dramatically lower the risks to officers.

The two bombs that went off near the finish line of the Boston Marathon on April 15, 2013, killing three and injuring more than 260 people, changed the way major outdoor events are held in the U.S. As the 2014 running of the Boston Marathon inches closer, organizers stress new security protocols that will make the race a safer experience for all.

In 2014-15, the Ebola virus was a source of devastation for millions in West Africa. The disease-which quickly causes severe hemorrhaging, organ failure, and death-was primarily found in isolated parts of central Africa until the outbreak. The three nations at the center of the epidemic were Guinea, Liberia and Sierra Leone, all of which share borders. According to the Centers for Disease Control, the World Health Organization confirmed more than 11,000 deaths from 28,000 cases of Ebola through the end of August 2015. The Ebola epidemic was a major test for crisis responders in the public health field. First responders and crisis response agencies can learn from the way organizations across the globe worked together to ultimately contain the virus. Examining both global and local efforts reveals some key lessons about readiness in any situation. Some of these lessons may be important immediately, as the Zika virus spreads and becomes a global threat.