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Nasire Best

Credit: AP Photo/Alex Brandon/Alex Brandon

Baltimore track teammates shocked after man was killed in gunfight with Secret Service

Analysis: Gunfire at the White House reveals America’s dangerous new security reality

What we know about the Maryland man accused of shooting Secret Service near the White House

Bystander in serious condition after fatal shooting near White House checkpoint

‘Every second matters’: How effective are post-9/11 counterterrorism systems against the ‘lone actor’?