Dallas city officials blamed hackers for setting off emergency sirens.

Dallas city officials blamed hackers for setting off emergency sirens.

Dallas city officials blame 'hack' for siren malfunction #U_S_A_ #iNewsPhoto

Dallas city officials blame 'hack' for siren malfunction

Dallas city officials blame 'hack' for siren malfunction #U_S_A_ #iNewsPhoto

Marriott Dallas City Center

Marriott Dallas City Center

skyline, tie dye, galaxy, grunge 90's, Sweatshirt jumper Oversize, Unisex, | eBay  One of my own designs :)

skyline, tie dye, galaxy, grunge 90's, Sweatshirt jumper Oversize, Unisex, | eBay One of my own designs :)

London art clock made of vinyl record, London skyline, London underground…

London art clock made of vinyl record, London skyline, London underground…

1958 Ferrari 250 GT California Spider • Photo by: @roadrunner333 #DriveVintage

The Ferrari F12 Berlinetta

1958 Ferrari 250 GT California Spider • Photo by: @roadrunner333 #DriveVintage

Dallas city officials have added extra encryption to bolster the security of outdoor warning sirens hacked early Saturday.

Dallas city officials have added extra encryption to bolster the security of outdoor warning sirens hacked early Saturday.

CANVAS ART Print Dallas at Night Skyline - Wall Art Canvas Dallas City Skyline at Night Shot Over the Trinity River

CANVAS ART Print Dallas at Night Skyline - Wall Art Canvas Dallas City Skyline at Night Shot Over the Trinity River

Extra Large Canvas Print - Texas Dallas Skyline Black & White Night Cityscape, Dallas Large Canvas Print, Texas Dallas City Art Canvas Print

Extra Large Canvas Print - Texas Dallas Skyline Black & White Night Cityscape, Dallas Large Canvas Print, Texas Dallas City Art Canvas Print

The Dallas News building, on Commerce Street between Lamar and Austin, Dallas, Texas, circa 1885. Next to it were the Grand Windsor hotel (left), and the two-story Dallas City Hall. Photo courtesy Dallas Morning News.

The Dallas News building, on Commerce Street between Lamar and Austin, Dallas, Texas, circa 1885. Next to it were the Grand Windsor hotel (left), and the two-story Dallas City Hall. Photo courtesy Dallas Morning News.

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