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Facebook activates Safety Check after deadly airport bombings in Turkey

Tool for informing contacts that you are safe turned on after three suicide bombings at Istanbul Ataturk Airport kill at least 28 people.

Facebook turns on Safety Check tool after suicide bombers kill dozens in Turkey.

Facebook activated its Safety Check feature on Tuesday in the wake of three suicide bombings at Istanbul Ataturk Airport that claimed at least 28 lives and injured another 60.

It's the second time in a little more than two weeks that the social network has activated the tool, which lets Facebook users who are at or near the site of a natural disaster or terrorist attack inform their friends on the network that they are safe.

The tool was also activated earlier this month after the deadly attack on an Orlando, Florida, night club claimed the lives of 49 people -- the first time it had been activated in the US.

Safety Check automatically sends Facebook users in an affected area a note asking if they're safe. When a user clicks on "yes, let my friends know," the tool notifies their Facebook friends. The social network tool -- also activated earlier this year after terrorist bombings struck the airport and subway in Brussels, Belgium -- is one of the many ways the internet has become an essential tool in responding to crises.

Safety Check was activated for the first time as a response to terrorism following the Paris attacks in November. Until then, it had only been used after natural disasters.

"Our hearts go out to everyone touched by these tragic events," Facebook said in a statement. "We hope the people in the area find the tool a helpful way to let friends and family know they are okay."