But the Pentagon conceded it is not yet satisfied with its plans to respond to some of the 15 catastrophic attack scenarios that federal agencies have been ordered to prepare for, such as a nuclear attack or a series of chemical attacks throughout the country.

Mr Paul McHale, assistant defence secretary for homeland defence, said on Friday plans to respond to those scenarios would be improved this year.

'We are prepared to respond,' Mr McHale said. 'We are not prepared to respond with the speed, the efficiency and the effectiveness that we intend to achieve.'

He said detailed plans for a response to a major hurricane or pandemic influenza were well developed and on par with the blueprint drafted for war operations.

When it came to responding to a nuclear attack, a series of dirty bomb attacks, an aerosolised anthrax attack or a series of chemical weapons attacks throughout the country, the current plans were inadequate, Mr McHale said.

'That is a candid recognition, a blunt recognition that we are not where we need to be,' he said.

He dismissed the harsh criticism directed at the Defense Department on Thursday by the Commission on the National Guard and Reserve and its chairman, retired Marine Corps Major-General Arnold Punaro.

Mr Punaro called planning for a domestic attack 'totally unacceptable'. The commission was especially worried about an 'appalling' lack of trained troops for that role. -- REUTERS