It was more than 72 hours after the quake and no cry for help could be heard from the rubble of Beichuan Middle School amid the din of heavy machinery around.
A rescue team from Chongqing was doing a last search on the school's collapsed main building, giving up hope of any survivors - when a sniffer dog barked...
Full story: http://www.hitechwave.com/2008/05/tr...hance-for.html