Summary : Large spiral pattern in sky. wind blew cloud moved pattern didn't 2 armed helicopters completly black arived at area warning of with live guns any people in the area.age 13,39,36,6,9,8 of wittnesses. Large black spiral shaped pattern/object/cloud. when the wind blew all surrounding cloud moved spiral shaped object didn't. object was black and large. cloudy warm day. lots of fields, grass areas near motorway and object. 2 large armed black unmarked helicopters cleared the surrounding area of people and animals with gun fire. the lost sight of object.