These links should take you to a number of publicly available, free news feeds. I have differentiated this from industry publications and research sites that have news feeds, because those feeds typically involve some editorial choices. These should be anything and everything most reasonable people would categorize as Aerospace and Defense related

Yahoo! News -- Aerospace & Defense
A category within the Yahoo! Family. From here, you should see most of the items that come across PR Newswire, Business Wire, Reuters, etc.

iwon.com -- Aerospace & Defense
A category within the iwon.com site. They only use Reuters as a source..