(AFP/File) – Construction workers and heavy machinery operate at the building site at "Ground Zero" of the World Trade Center development, in New York, 2007. Construction of skyscrapers and an underground transport hub to replace the World Trade Center destroyed in the September 11 terror attack will be delayed for years and cost much more than planned, The Wall Street Journal reported Monday.(AFP/File/Emmanuel Dunand)

(AP) – This 2005 file artist’s rendering provided by the Port Authority of New York and New Jersey shows the planned transit hub designed by Spanish architect Santiago Calatrava for the World Trade Center site in New York. The World Trade Center’s owner on Monday, June 30, 2008, proposed scrapping the schedule and budget for the prolonged rebuilding of the site of the Sept. 11 terrorist attacks, saying nearly every project is delayed and over budget and that previous estimates ‘are not realistic.’ The transit hub, once budgeted at $2.2 billion, presents some of the greatest rebuilding obstacles and now estimates for it have soared as high as $3.4 billion. (AP Photo/Port Authority of New York and New Jersey, File)

(AP) – This file picture provided by Silverstein Properties, Inc. in Sept 2006 shows an artist’s rendering of three proposed designs for the remaining towers at the World Trade Center site in New York, shown alongside the 1,776-foot Freedom Tower, left, in downtown Manhattan’s skyline. The World Trade Center’s owner on Monday, June 30, 2008, proposed scrapping the schedule and budget for the prolonged rebuilding of the site of the Sept. 11 terrorist attacks, saying nearly every project is delayed and over budget and that previous estimates ‘are not realistic.’ (AP Photo/Silverstein Properties, Inc., File)

(AP) – In this file photo of Friday, June 20, 2008, construction cranes work above the Freedom Tower foundations at the World Trade Center site in New York. The World Trade Center’s owner on Monday, June 30, 2008, proposed scrapping the schedule and budget for the prolonged rebuilding of the site of the Sept. 11 terrorist attacks, saying nearly every project is delayed and over budget and that previous estimates ‘are not realistic.’ (AP Photo/Mark Lennihan, File)

(Reuters) – Construction Work continues at the Western section of the World Trade Center site in New York, June 25, 2008. (Mike Segar/Reuters)

(AFP/HO/File) – Australia's Men's 470 class team trains on the algae-infested waters on June 24. A huge algae bloom at the Beijing Olympics' sailing venue will take at least another two weeks to eradicate despite more than 10,000 workers being used in the clean-up effort.(AFP/HO/File)

(AFP/File) – Workers remove the bright green algae smothering beaches and extending out several hundred metres (yards) into the Yellow Sea off Qingdao, east China's Shandong province, on June 27. China's pledge of a "Green Olympics" has taken on a worrying meaning at the sailing-venue city of Qingdao, where an algae bloom has coated the coastline.(AFP/File)