New U.N. Syria peace envoy Staffan de Mistura will meet members of the Security Council on Friday as he seeks to revive efforts to end the Syrian civil war. The former Italian deputy foreign minister was appointed by U.N. Secretary-General Ban Ki-moon last week to replace Lakhdar Brahimi, who resigned in May after two rounds of peace negotiations ended in failure. The United Nations hopes to get a peace process restarted, but it remains unclear if the roadmap agreed during talks in Geneva six months ago can be salvaged.