A visualization constructed using the vega-lite-api. The viz shows the perpetrators who conducted crimes in the United States during 1975 to 2017 and their target type with corresponding weapon type.

• From the viz we can see that the Private Citizens & Property and Business are almost the common target for all the perpetrators.
• And most of the blocks are color green, which means Explosives/Bombs/Dynamite is the favourite weapon for the terrorists.

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