David Welna David Welna is NPR's national security correspondent.
David Welna 2010
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David Welna

Arms Merchants Go To The Pentagon

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The ballistic missile submarine USS Rhode Island returns to port after a patrol. The president of the United States has the unilateral authority to order it to launch its nuclear weapons. MC1 James Kimber/U.S. Navy hide caption

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MC1 James Kimber/U.S. Navy

Shaken By Trump, Senators Ask: What Stops Him From Launching Nukes?

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Senate Panel Will Question Presidential Authority To Launch Nuclear Strike

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How The National Instant Criminal Background Check System Works

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U.S. Army Relocates Its Korean Military Base South Of Seoul

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What It's Like In The Demilitarized Zone That Divides North And South Korea

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News Brief: Mattis In Asia, Trump's Week, White Nationalists In Tennessee

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Mattis Calls For 'Denuclearization Of Korean Peninsula'

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Philippine President Rodrigo Duterte meets Defense Secretary Jim Mattis Oct. 24 at the 11th Association of Southeast Asian Nations (ASEAN) Defense Ministers' Meeting at the former Clark Air Base outside Manila. Dondi Tawatao/AFP/Getty Images hide caption

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Dondi Tawatao/AFP/Getty Images

With Mattis Trip To Philippines, Reminders Of Waning U.S. Influence In Region

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How China Is Making Moves To Be The Dominant Player In The Asian Pacific Region

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Mattis Meets With Duterte Ahead Of Trump's Trip To Philippines

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Trump May Put Congress On The Hook Over Iran Deal

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