Colonies in collapse: What's causing massive honeybee die-offs?

“So there I was, just sitting on a gravel lot next to all those empty hives, and there’s no dead bodies on the ground, there’s no bees in the hive, and there’s no wax moths or hive beetles, nothing trying to rob out the honey, the way they usually do.”

Pausing a moment, he declares, “I’ve been trucking bees up and down the East Coast for 40 years and I’d never seen anything like this. This was different. For me, that’s the day a lot of bells started ringing.”