The 60 minutes episode on bees is available at their web site.
Interesting quotes:

"Hackenberg says most beekeepers believe the culprit is a relatively
new type of pesticide called neonicotinoids"

Jeff Pettis responds:
"Well, if that's true then we'll be able to find certain levels of
different pesticides in those hives and we don't have that complete
picture yet. We just don't have consistency that points us in that
direction."

-- 
Pete

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