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

Defense Secretary Jim Mattis Tells Department To Defend The Constitution In Farewell

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New Armed Services Chairs Have Starkly Different Views On Measures, Spending

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Trump Picks Patrick Shanahan To Be Acting Secretary Of Defense

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The Many Conflicts Between Defense Secretary Mattis And President Trump

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Pentagon Confirms Mattis Resigns Effective Feb. 28

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Trump Administration Gives Russia Deadline To Comply With Missile Ban

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Trump Plans To Ask The U.S. Military To Pay For The Border Wall

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News Brief: Trump Inaugural Committee, Border Wall, Possible Ban On Cockfighting

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Then-Vice President George H.W. Bush meets with members of a commission set up in 1986 to probe the operations of the National Security Council staff in the wake of the Iran-Contra scandal. Pictured are former Secretary of State Edmund Muskie (from left), Bush, commission chairman John Tower and Ford national security adviser Brent Scowcroft. Charles Tasnadi/AP hide caption

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Charles Tasnadi/AP

Central American migrants line up to apply for jobs at a job fair in Tijuana, Mexico. More than two thousand migrants have applied for a one-year humanitarian visa that would allow them to hold jobs legally in Mexico. David Welna/NPR hide caption

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Stuck In Tijuana, Many Central American Migrants Opt For A Job

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Central American migrants wait in line in hopes of receiving donated food and hygiene supplies, outside of a sports complex serving as a shelter for more than 5,000 Central American migrants, in Tijuana, Mexico. Rebecca Blackwell/AP hide caption

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Rebecca Blackwell/AP

Tijuana Residents Grow Irritated By Influx Of Central American Migrants

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Some Active Duty Soldiers Deployed To U.S.-Mexico Border Moved To California

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Members of the 89th Military Police and 541st Engineering Company, 19th Engineering Battalion at Fort Knox, Ky., are briefed upon arrival Wednesday at Lackland Air Force Base, Texas. They are among some 7,000 troops deploying to the U.S.-Mexican border. Senior Airman Alexandra Minor/Department of Defense hide caption

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Senior Airman Alexandra Minor/Department of Defense

First Wave Of Troops Sent To U.S.-Mexico Border Arrives In Texas

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