Four dangers the nuclear talks will overlook | After Brussels attacks, leaders tackle threat of nuclear terrorism | The right approach to terrorism | Is the international community out of ideas to combat terrorism? | America needs more skilled immigrant workers, study says | DHS wants input on sharing data for cyber insurance | Why airline hijackings became relatively rare | The little we know about the jihadists in our midst | What is “Google dorking,” and how did it help an Iranian hacker compromise a U.S. dam? | Infamous neo-Nazi hacker-troll claims responsibility for racist, anti-Semitic fliers at UC Berkeley; FBI investigating | US company invents gun that looks just like a cellphone; sparks criticism | Homeland chairman: ‘Active plot underway in Turkey’ | US lags behind goal to accept 10000 Syrian refugees by Oct. | Government must invest now to protect against biological threats | Google also has been ordered to help unlock phones, records show