BESLAN, Russia, Sept. 4 - Long before the first bombs exploded in Middle School No. 1, marking the beginning of a ferocious battle that left hundreds of schoolchildren and their parents and teachers dead, the hostages had descended to near despair. "At first I thought it was a joke," said one survivor, Emma Gagiyeva, 13, who sat numbly on a couch on Saturday, as the death toll climbed relentlessly, to 330, with many children still missing. "Then they started to shoot the windows, and glass fell on the people. They were shooting above our heads and they killed a few...