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Syrian firefighters spray water on burning car at the site of a double car bomb attack in the Al-Zahraa neighborhood of the central Syrian city of Homs on February 21, 2016. Homs city is almost completely controlled by the Syrian government, and has regularly been targeted in bomb attacks. / AFP / STRINGER (Photo credit should read STRINGER/AFP/Getty Images)

Syrian firefighters spray water on burning car at the site of a double car bomb attack in the Al-Zahraa neighborhood of the central Syrian city of Homs on February 21, 2016.
 
Homs city is almost completely controlled by the Syrian government, and has regularly been targeted in bomb attacks.

 / AFP / STRINGER        (Photo credit should read STRINGER/AFP/Getty Images)