1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep 2) a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium 3) a humorous anecdote or remark intended to provoke laughter DOWN 1) a small piece of cloth or paper 2) a terrorist organization organized in 1959 by student activists who were dissatisfied with the moderate nationalism of the traditional basque party; want to create an independent homeland in spain's western pyrenees 3) white crystalline compound used as a food additive to enhance flavor; often used in chinese cooking ** Scroll down for solution. ** Are you sure you want to peek? rem ats gag