The American offshoot of the “Freedom Convoy” that brought chaos to Canada’s capital is promising to stop traffic outside of Washington, D.C., on Saturday, but exact plans remained vague Friday as the group hit its last pit stop in Maryland. The convoy, which was organized on pro-Trump and anti-vaccine channels on the Telegram messaging app, has picked up hundreds of cars and several trucks since the group left a rural parking lot in Adelanto, California, on Feb. 22. According to extremism researchers following the movement, the convoy now consists of several dozen tractor-trailer trucks and hundreds of cars.