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Final Approach
http://www.nytimes.com/2009/01/17/nyregion/17strikecnd.html?_r=1&hp
In the physical tests, the engines are revved to full power inside a test facility and absorb various kinds of birds, from those the size of sparrows to those the size of herons, one at a time. (The birds are already dead.) The engines also ingest multiple birds meant to simulate a collision with a flock, said Matthew Perra, a spokesman for the engine manufacturer Pratt & Whitney.