Hack Sets Off City Emergency Alarms in Dallas
The City of Dallas, Texas, emergency alarm system was compromised by a hacker or hackers late Friday night. All 156 outside sirens, usually used for severe weather warnings, were activated more than a dozen times between approximately 11:45 pm Friday and 1:20 am Saturday until engineers manually disabled the system.
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Story added 10. April 2017, content source with full text you can find at link above.