Turkey is holding a day of mourning following the deadly bombing attacks at Istanbul's Ataturk airport.
Three attackers opened fire in the airport, and then blew themselves up, killing over 40 and injuring over 200 in the process.
Turkish authorities say they believe the Islamic State group is behind the attack.
The attack came just one day after the US State Department issued a warning to American citizens to watch out for terror threats in Turkey.
However, State Department spokesperson Mark Toner said he's not saying people shouldn't visit the country.
IN: "In any..."
OUT: "...these threats."
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