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b'The Defense Industrial Base is\\xa0pretty vast but, like the ice cap, it\\u2019s steadily shrinking. The latest version of an annual report by the National Defense Industrial Association finds this:\\xa0Even though thousands of new companies are getting DoD contracts each year, it is not enough to make up for the number of firms leaving the Defense market. In fact, more than 17,000 companies left the Defense Industrial Base in the past five years. Federal News Network\\u2019s Jared Serbu has more on the statistics, and what companies say about their biggest challenges.\\nLearn more about your ad choices. Visit megaphone.fm/adchoices'