WASHINGTON — All 800 National Guard troops whom President Donald Trump ordered into the streets of Washington this week to fight crime have mobilized for duty, the Pentagon said Thursday.

In round-the-clock shifts of 100 to 200 unarmed soldiers, the Guard will support Washington police and federal law enforcement officers by protecting monuments and federal buildings, conducting “community safety patrols” and carrying out “area beautification,” said Kingsley Wilson, the Defense Department’s press secretary.

“They will remain until law and order is restored in the District,” Wilson told reporters at an unusual midsummer news conference on the steps of a Pentagon entrance. “It’s a deterrent. It makes people feel safe.”

Although crime rates in the capital have been falling sharply in the p

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