Focus shifts to Tibet earthquake survivors as search called off

By Joe Cash and Ryan Woo BEIJING (Reuters) - Authorities moved more than 45,000 people in earthquake-hit Tibet to shelters in a massive rescue operation at the foot of the Himalayas as they wound down the search in a high-altitude environment where the odds of survival were always slim. The epicentre of Tuesday's 6.8 magnitude quake, one of the Chinese region's strongest tremors in recent years,