Cautious optimism may be the best way to term the agreement reached Thursday in Munich for a cessation of hostilities in Syria. The Turkish Foreign Minister called it “an important step,” while the U.N. chairman of the Munich meeting said it “could be the breakthrough we’ve been waiting for.” U.S. Secretary of State John Kerry, who came to Munich to make an “all or nothing” effort, was soberly realistic, saying implementing a nationwide cessation of hostilities within a week “is ambitious.” The agreement, which would allow delivery of much needed food, water and medical supplies to Syrian civilians, is not being called a cease-fire, which Kerry described as a more permanent step. However, it is somewhat encouraging that the U.S., Russia and others at the table can agree to take this first step.