"Europe had to react against this violation of basic principles," Merkel said.
The signing follows more than a decade of negotiations between the two countries.
Assad estimated that economic and infrastructure damage to the country "exceeds $200 billion".
Rebels say they are ready to fight on despite their recent defeats
Syrian officials have indicated no plans to ease up the war effort
Washington and Moscow's support for opposite sides in the five-year-old war means a local conflict has become an...
The United Nations is aiming for six months of negotiations, first seeking a ceasefire, later working toward a political settlement...