▁area ▁and ▁not ▁part ▁of ▁any ▁bigger ▁' ri ot ▁wave '. ▁Events ▁in ▁ 1 9 8 1 ▁were ▁very ▁similar ▁to ▁those ▁in ▁England , ▁although ▁sources ▁are ▁sever ely ▁limited . ▁Both ▁N idd rie ▁and ▁Craig mill ar ▁saw ▁ri ots ▁in ▁the ▁ 1 9 8 0 s . ▁ ▁United ▁States ▁ ▁Under ▁United ▁States ▁federal ▁law , ▁a ▁ri ot ▁is ▁defined ▁as : ▁ ▁A ▁public ▁disturb ance ▁involving ▁( 1 ) ▁an ▁act ▁or ▁acts ▁of ▁violence ▁by ▁one ▁or ▁more ▁persons ▁part ▁of ▁an ▁assemb lage ▁of ▁three ▁or ▁more ▁persons , ▁which ▁act ▁or ▁acts ▁shall ▁const itute ▁a ▁clear ▁and ▁present ▁danger ▁of , ▁or ▁shall ▁result ▁in , ▁damage ▁or ▁injury ▁to ▁the ▁property ▁of ▁any ▁other ▁person ▁or ▁to ▁the ▁person ▁of ▁any ▁other ▁individual ▁or ▁( 2 ) ▁a ▁threat ▁or ▁thre ats ▁of ▁the ▁commission ▁of ▁an ▁act ▁or ▁acts ▁of ▁violence ▁by ▁one ▁or ▁more ▁persons ▁part ▁of ▁an ▁assemb lage ▁of ▁three ▁or ▁more ▁persons ▁having , ▁individually ▁or ▁collect ively , ▁the ▁ability ▁of ▁immediate ▁execution ▁of ▁such ▁threat ▁or ▁thre ats , ▁where ▁the ▁performance ▁of ▁the ▁threatened ▁act ▁or ▁acts ▁of ▁violence ▁would ▁const itute ▁a ▁clear ▁and ▁present ▁danger ▁of , ▁or ▁would ▁result ▁in , ▁damage ▁or ▁injury ▁to ▁the ▁property ▁of ▁any ▁other ▁person ▁or ▁to ▁the ▁person ▁of ▁any ▁other ▁individual .. ▁ ▁Each ▁state ▁may ▁have ▁its ▁own ▁definition ▁of ▁a ▁ri ot . ▁In ▁New ▁York