(Adds Air New Zealand, Qantas, Singapore Airlines)
BERLIN/PARIS, March 26 (Reuters) - Airlines rushed on Thursday to change their rules so as to require a second crew member in the cockpit at all times, hours after French prosecutors suggested a co-pilot who barricaded himself alone at the controls of a jetliner had crashed it on purpose.
The United States already requires two crew members to be in the cabin at all times, but many other countries do not, allowing pilots to leave the flight deck, for example to use the toilet, as long as one pilot is at the controls.
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