At a refugee camp in Syria, 25,000 people live in 3,600 shipping containers that have been converted into temporary homes. This week marks the start of the fifth year of conflict in Syria with more than 200,000 Syrians killed, nearly 8 million displaced inside Syria, and another 4 million, half of whom are children, having fled in neighboring countries. The United States is the single largest donor, having provided over $3 billion in assistance, but with little appetite for significant boots on the ground, American diplomacy and development will remain critical to the amelioration and resolution of the crisis.