AMMAN, Jordan, Dec. 8 (UPI) -- Celebrations swept Damascus on Sunday after Syrian rebels entered the city and ended the rule of President Bashar Assad , who reportedly fled the country, but his fate remained unknown, Arab TV stations and Syrian Observatory for Human Rights reported. Assad's fall came 11 days after the Syrian opposition forces, led by Ahmed Sharaa, better known as Abu Mohammad al-Jolani, the leader of the Jihadist rebel group Hayat Tahrir Al-Sham, launched lightning attacks and