Copter crash one of Marines' deadliest in years (AP)

[unable to retrieve full-text content]AP - A collision that killed seven Marines in one of the Marine Corps' deadliest aviation training accidents in years occurred over a sprawling desert range favored by the U.S. military because its craggy mountains and hot, dusty conditions are similar to Afghanistan's harsh environment.

Source: http://us.rd.yahoo.com/dailynews/rss/usmilitary/*http%3A//news.yahoo.com/s/ap/20120224/ap_on_re_us/us_military_helicopters_collide

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