where conditions are now worse than any seen during 12 years of war. at last, five days after the quake, a convoy of 14 un aid lorries arrives at bab al—hawa. but even then, it wasn't the urgently needed search and rescue equipment. i'm here at the bab al—hawa crossing point... two days later, martin griffiths, the un's head of emergency relief, makes an extraordinary admission. writing on twitter, he says the un has so far failed the people of north—west syria.