1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) black tropical american cuckoo 2) a sheath worn to protect a finger 3) a rapid automatic system to detect plastic explosives in passengers' luggage using x-ray technology and computers; designed for use in airports DOWN 1) the smallest whole number or a numeral representing this number 2) a sign of assent or salutation or command 3) the branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information ** Scroll down for solution. ** Are you sure you want to peek? ani cot eds