The new Syrian cease-fire, brokered by Russia and the United States, is expected to begin Monday evening. It’s still unclear if rebel factions, who have expressed reservations about the agreement, will abide by the deal. In a rare public appearance, President Bashar al-Assad attended prayers at a mosque Monday in a newly surrendered Damascus suburb on Eid al-Adha, a Muslim holiday. In a defiant statement broadcast on state-run TV, Assad said his government is determined to “reclaim every area from the terrorists.” Russian Foreign Minister Sergey Lavrov and Secretary of State John Kerry agreed to the cease-fire in Geneva over the weekend. It stipulates an initial “pause” in fighting between all sides in order to make way for humanitarian aid. Eventually, according to the complex deal, the U.S. and Russia would coordinate airstrikes against militants inside the country.