The document also says that CIA officials have largely ignored a law approved last October, requiring them to eliminate guidelines that make it difficult for field officers to recruit human rights offenders and other unsavoury characters.

"The excessive caution and burdensome vetting process resulting from the guidelines undermined the CIA's ability and willingness to recruit foreign assets," according to the committee.

The CIA must also take more interest in language skills and reward agents who achieve proficiency in languages.

The Committee also looked at the National Security Agency which eavesdrops on phone and internet messages around the world.

The Agency is told to stop being a "passive gatherer" of information and start to be an "active hunter".

According to press leaks from the hearings, on 10 September the NSA intercepted two messages in Arabic - which reported said "The match is about to begin" and "Tomorrow is zero hour" - but they were not translated until 12 September.

Changing role

The FBI is accused of not placing sufficient emphasis on preventing terrorism acts.

Until 11 September, the FBI was mainly a law-enforcement agency. It focused on fighting organised crime, drug trafficking and other domestic criminals.

It had an intelligence unit, but its chief focus was stopping foreign powers from spying in America.

Last July, an unnamed FBI agent in Phoenix, Arizona, issued a memo calling for an investigation into the large number of Middle Eastern men enrolled in pilot training programmes.

However, senior FBI officials paid little attention to the memo, which was marked "non-urgent".

Experts have said turf battles between the agencies and an inability of key classified computer systems to work together have led to US intelligence agencies having pieces of the puzzle without anyone having the ability to fit those pieces together.

Finally, the Committee criticised Congress itself: American politicians share the blame for the intelligence failings it says, because they fail to provide sufficient resources to do the job.

In a speech on Tuesday, President Bush unveiled a long-awaited homeland security strategy.

It includes using troops to enforce quarantines during a biological attack and "red teams" of agents thinking like terrorists to pinpoint weaknesses.

The 88-page plan also calls for tighter border controls, more executive powers and new secrecy laws.