Laborious 'black box' inquiry aims to unlock German crash cause

By Tim Hepher PARIS (Reuters) - A warren of laboratories on the outskirts of Paris is where French investigators could face months of laborious and complex detective work to try to establish what caused a German airline disaster in the French Alps that killed 150 people. One of the Germanwings Airbus A320's two 'black boxes' was found hours after Tuesday's crash and will come under scrutiny at the spartan offices of France's Bureau d'Enquete d'Accidents (BEA, or office of accident investigations