The U.S. Army is just about finished with a six-week experiment in which it took iOS, Android and Windows Phone 7 devices into the field to see which of the operating systems best suits its needs. Out of the three, two will be selected to be approved devices, and the reason behind narrowing it down was in hopes of keeping the development costs down, they won't need to ensure all three platforms have the same applications, instead just two. Both iOS and Android devices were well received by the folks, and no official word about Windows Phone 7 at this point. Will be interesting to see, will our nation put Android devices in the hands of the folks in the U.S. Army? We must wait and see.