They typically investigate drug lords, weapons traffickers or cyber criminals. This week, though, federal agents are fanning out across the nation's capital as part of President Donald Trump’s efforts to clamp down on crime in the city.

The sometimes-masked agents joined members of the National Guard as well as the United States Park Police, whose responsibilities include protecting the country's monuments and managing crowds during demonstrations.

Soldiers in fatigues kept watch near Union Station, while officers with the Drug Enforcement Administration patrolled along the National Mall. Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives helped question a couple in northwest Washington who were parked illegally and eating McDonald’s takeout.

Trump said Monday that

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