After 21 months of war, at least two million Syrians have been forced to leave their homes. Hundreds of thousands have fled abroad, where they live in dire conditions. But most are displaced inside Syria – camping in tents, sharing overcrowded rooms with relatives, renting private flats, or squatting in shivering school buildings. (..) The cardinal problem is bread – Syria's most important food staple. There is not enough to go round.