Can U.S. afford plan to buy 12 nuclear-armed subs?
Clip: Season 2015 | 4m 3s
Naval historian and consultant Norman Polmar says buying new nuclear-armed submarines is necessary to replace the aging ones in today's arsenal, but not in as many numbers as the Navy plans. Polmar tells the PBS NewsHour alternatives must be explored.
Aired: 07/31/15
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