FBI arrests Seattle man in connection with alleged Halloween terror plot

New developments in what investigators are calling an ISIS inspired Halloween terror plot that was thwarted by the FBI. >> A Washington state man has been arrested in connection with the investigation. He is the fourth person taken into custody this week and it comes just days after federal agents launched raids outside Detroit.Let's bring in NBC News national law enforcement and intelligence correspondent Tom Winter who is following this investigation for us. Tom, what more can you tell us about this Seatt ...