In the wake of the Orlando mass shooting, Facebook has activated its “safety check” feature for the first time on U.S. soil.
Facebook CEO Mark Zuckerberg posted about the activation this morning, writing that he was “deeply upset” about the incident and encouraging Floridians to donate blood.
Facebook launched the safety check feature in 2014, as a way for family and loved ones to let each other know they’re safe in the wake of a disaster.
Last year, the company said it would deploy the feature more often after being criticized for activating it in the wake of the Paris attack, but not during a bombing in Lebanon the day before.
Since then it has been used after a number of terror attacks, including in Pakistan, Turkey, and Belgium.