WATCH: National Guard humvees, roughly 30 troops stand guard outside DC's Union Station amid police takeover

As National Guard troops ramped up their presence in the nation's capital on Thursday, about seven National Guard Humvees and other military vehicles, and around 25 to 30 troops, stood guard outside D.C.'s Union Station.   President Donald Trump's move to federalize parts of the District of Columbia's police force began earlier in the week, but troops from the National Guard scaled up their presence Thursday, with several stationed around the National Mall, at metro stations, at Union Station, near a U.S. Park building in Anacostia, D.C., and other places around the nation's capital.As of Thur