DOHA, QATAR - DECEMBER 18: Qatar Air Forces unfurl the flag of Qatar during the 137th anniversary celebrations of the Qatar's National Day in Doha, Qatar on December 18, 2015. Thousands of people have gathered along Doha's waterfront to celebrate Qatar's National Day. The annual holiday marks the date in 1878 when Sheikh Jassim bin Mohammed Al Thani succeeded his father and led the country towards unity. (Photo by Mohamed Farag/Anadolu Agency/Getty Images)
