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A Pakistan Navy commando descends from a helicopter during a national exercise called "Aman09" in the Arabian Sea near Karachi March 9, 2009. Naval forces from nine countries, including the United States,
_tcm87-55017.jpg "Top Private Helicopters")
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Danger spins from the sky: The Robinson R44, the world's best-selling civilian helicopter, has a long history of deadly crashes - Los Angeles Times
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Solved Question 13 Helicopters are designed with two sets of | Chegg.com
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