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

What's Changed In Afghanistan Since President Trump Decided To Stay

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Trump Signs Annual Defense Policy Bill, Lists Many Things He Doesn't Like About It

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North Korean leader Kim Jong Un shakes hands with U.S. President Trump during their summit on June 12 in Singapore. Kevin Lim/The Straits Times/Getty Images hide caption

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Kevin Lim/The Straits Times/Getty Images

Defense Secretary Jim Mattis speaking to reporters aboard an armored version of a 747 which functions as an airborne command post. David Welna/NPR hide caption

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David Welna/NPR

In A Tumultuous Administration, Defense Secretary Endures

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A Russian intercontinental ballistic missile is moved during military training in the mid-1990s near Irkutsk, Siberia, Russia. Arms control has been at the center of a decades-long discussion between Russia and the U.S. Associated Press hide caption

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Associated Press

Arms Control Surfaced In Helsinki, But It's Likely Just Talk

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How The Trump-Putin Summit Could Affect 2 Arms Control Treaties

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A U.S. Navy senior chief petty officer stands watch ahead of a ceremony inaugurating the U.S. anti-missile station Aegis Ashore Romania at Deveselu, Romania, in 2016. The station is part of NATO's anti-missile shield for Europe. Daniel Mihailescu/AFP/Getty Images hide caption

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Daniel Mihailescu/AFP/Getty Images

FACT CHECK: Trump's Claims On NATO Spending

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The National Security Rationale

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U.S. Secretary of State Mike Pompeo arrives for a signing ceremony between North Korean leader Kim Jong Un and President Trump in Singapore last month. Saul Loeb/AFP/Getty Images hide caption

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Saul Loeb/AFP/Getty Images

Experts Skeptical That North Korea Is Serious About Denuclearizing

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U.S. service members walk off a helicopter on the runway at Camp Bost in Helmand Province, Afghanistan on September 11, 2017. Andrew Renneisen/Getty Images hide caption

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Andrew Renneisen/Getty Images

Pentagon Questioned Over Blackout On War Zone Troop Numbers

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The Air Force currently oversees many of the military's space activities, such as the experimental X-37B spacecraft. Michael Stonecypher/USAF hide caption

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Michael Stonecypher/USAF

Trump Calls For 'Space Force' To Defend U.S. Interests Among The Stars

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An F-35 Lightning II in flight. Congress is moving to block delivery of the warplane to Turkey, a NATO ally and member of the nine-nation consortium manufacturing the warplane. U.S. Air Force photo/Senior Airman Julianne Showalter hide caption

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U.S. Air Force photo/Senior Airman Julianne Showalter

Why Lawmakers Are Trying To Block Delivery Of Fighter Jets To Turkey

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A screenshot of a video shared on White House social media accounts. The video — a fake movie trailer encouraging cooperation between President Trump and North Korean leader Kim Jong Un — was shown to Kim by Trump himself on an iPad toward the end of their summit in Singapore Tuesday. White House/Screenshot by NPR hide caption

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White House/Screenshot by NPR

'Shaking The Hand Of Peace': Unpacking Trump's North Korea Movie Trailer

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