This nation lost its southern Golan Heights region to Israel in the 1967 Six-Day War, and saw airstrikes in its central city of Homs by the Russian Air Force in 2015. In that same year, 2015, one-fourth of Lebanon's population was made up of refugees from this nation, which has been mired in a seven year civil war involving an estimated 7,000 armed groups. One refugee from this nation, Aylan Kurdi, was found dead on a beach in an iconic photograph that prompted worldwide outrage. For 10 points, name this Middle Eastern nation, still led by controversial leader Bashar Assad.
a) Iraq
b) Yemen
c) Libya
d) Syria