World Trade Center memorial plaza scheduled to open in 2011 , museum in 2012 . Memorial at Pennsylvania plane crash site also due to open in 2012 . Pentagon memorial including benches , gardens , pools is dedicated Thursday . The memorial will feature two huge reflecting pools , with waterfalls flowing down their sides , where the iconic twin towers stood , according to the memorial 's Web site . Live 9/11 memorials in New York and Washington on CNN.com Live .
World Trade Center memorial plaza scheduled to open in 2011 , museum in 2012 . Memorial at Pennsylvania plane crash site also due to open in 2012 . Pentagon memorial including benches , gardens , pools is dedicated Thursday . Live 9/11 memorials in New York and Washington on CNN.com Live .