washington anarchist group threaten shut republican donald trump swearing-in u.s. president police washington say friday believe thousands security officer assign event able head disruption dozens activist group plan protest jan. 20 inauguration new york real estate developer whose supporters count fulfill host controversial campaign promise include build wall mexican border deport millions illegal immigrants police expect 900,000 people flood washington inauguration ceremony include parade u.s. capitol white house along streets throng onlookers interim police chief peter newsham tell reporters friday addition two dozen activist group seek permit peaceful demonstrations washington police aware anarchist group vow online interrupt proceed fact folks indicate social media come shut inauguration events something prepare newsham say experience type thing city able handle it ask prospect mass arrest newsham say one things prepare anticipate case protest plan inauguration big event women march washington jan. 21. national park service say thursday would start issue permit protest sit civil right lawyers threaten sue say agency quash dissent 3,000 police officer outside district 5,000 national guard troop federal agents staff buff crowd-control barriers bag check say brian ebert head secret service district field office barriers place prevent possible truck attack attack berlin last month nice france july pro-pot lobby group vow distribute 4,200 joint light near inaugural site show support legalization marijuana nationwide marijuana legal district columbia consume private ask police would bust smokers mayor muriel bowser say first priority anarchists threaten disrupt trump inauguration police say ready