Kingda Ka
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Kingda Ka is a steel roller coaster at Six Flags Great Adventure in Jackson, New Jersey, USA. It is the tallest and fastest roller coaster in the world. It goes up 456 feet and can go 128 miles per hour. It first opened on May 21, 2005. To get up 456 feet, the train is launched by a machine to 128 miles per hour in 3 seconds. The train goes up the tower, and back down. At the bottom the train goes over a hill while it is slowing down. Soon it is going slow enough to be able to arrive safely back where it started. The ride lasts 28 seconds.