At the heart of the ARCH 1s sits the 124ci, high-torque ARCH / S&S V-twin engine, complemented by an ARCH-designed exhaust system. The chassis combines a steel mainframe with machined-billet aluminum subframe to create a unique performance architecture which gives the 1s intuitive handling and power delivery. Carbon fiber is used extensively throughout the 1s, providing a lighter, more agile riding experience.
In a later address before Congress, the president declared, "As a symbol of America's resolve, my administration will work with Congress, and these two leaders, to show the world that we will rebuild New York City." The immediate response from World Trade Center leaseholder Larry Silverstein was that "it would be the tragedy of tragedies not to rebuild this part of New York. It would give the terrorists the victory they seek." However, by 2011, only one building, 7 World Trade Center, had been rebuilt. The buildings that have been rebuilt as of June 2018 include 7 World Trade Center, One World Trade Center, 4 World Trade Center, and 3 World Trade Center. The original twin towers took less than three years from start of construction to be finished and five years from the beginning planning stages. However, given the complexity and highly political nature of the rebuilding efforts, they are often cited as an example of a successful public-private collaboration and are taught as a case study in successful negotiations.
A memorial called Reflecting Absence honors the victims of the September 11 attacks and the 1993 World Trade Center bombing. The memorial, designed by Peter Walker and Israeli-American architect Michael Arad, consists of a field of trees interrupted by the footprints of the twin towers. Pools of water fill the footprints, underneath which sits a memorial space whose walls bear the names of the victims. The slurry wall, which holds back the Hudson River in the west and was an integral part of Libeskind's proposal, remains exposed. Walker and Arad were selected from more than 5,000 entrants in the World Trade Center Site Memorial Competition in January 2004. 2b1af7f3a8