A file image from September 12th showing  smoke rising over the destroyed remains of the World Trade Center in New York, New York, USA as seen from Liberty State Park in Liberty City, New Jersey, USA. Terrorists flew two airliners into the twin towers of the World Trade Center causing them to collapse and killing more than 3000 people on 11 September 2001. The 15th anniversary of the worst terrorist attack on US soil will be observed today. Photograph: EPA

Christine Todd Whitman, who as head of the Environmental Protection Agency (EPA) under George W Bush at the time of the 9/11 attacks told the public t(...)