Kingda Ka , followed by a drop of and spanning over a track by the end of the ride. Plans to build Kingda Ka were announced on September 10, 2003, at an event held for roller coaster enthusiasts and the media. The event revealed the park's goal to build "the tallest and fastest roller coaster on earth", reaching and accelerating up to in 3.5 seconds. On January 13, 2005, Kingda Ka's tower construction was completed, and on May 21, 2005, the ride opened to the public. Kingda Ka became the "tallest" and "fastest" roller coaster in the world, taking both world records
Ka-Bar The "1095 Cro-Van" steel used in the blades of contemporary Ka-Bars has a hardness of 56–58 HRC, while the guard and pommel are made from sintered 1095 carbon steel. Besides use as a fighting knife, the Ka-Bar has proved useful as a utility knife, for opening cans, digging trenches, and cutting wood, roots, wire, and cable. In 1995, the design was updated with a stainless steel blade, synthetic handle, and synthetic sheath marketed as "The Next Generation". As of June 2012 the "Next Generation" models have been discontinued. In 1999, Ka-Bar released the "D2 Extreme" version of their fighting knife,