11.   Jeffrey Ethell is a historian of military aviation.

12.   Military aviation accidents omitted in official statistics.

13.   That worries Army planners, according to a military aviation expert who asked not to be named.

14.   That mobilization has been accompanied by a series of major military aviation accidents, most occurring in the United States.

15.   The Pentagon announced the change following published stories by The Dayton Daily News on military aviation safety.

16.   Then he entered test-pilot training at Patuxent River, Md., elevating himself into the elite of military aviation.

17.   There are also elaborate slide and video histories of the Arab-Israeli and Gulf wars and Soviet military aviation, along with three flight simulators.

18.   These are the practical realities of one of the worst military aviation disasters in years.

19.   Under the doctrine, military members and their families are prevented from filing lawsuits against the government over military aviation accidents that kill and injure military personnel.

20.   Bad weather brought the helicopter down and a search was underway for its black box, the report quoted military aviation sources as saying.