Anti-terrorism police have charged eight men with various offences, including conspiracy to murder.
Police made several arrests following raids across England
They were also charged with conspiracy to commit a public nuisance by using radioactive material, toxic gas, chemicals or explosives.
All eight will appear in Bow Street Magistrates' Court on Wednesday, Scotland Yard said on Tuesday.
A ninth man arrested with them on 3 August was charged with possession of a prohibited weapon.
Police charged them of conspiring "together and with other persons unknown" between 1 January 2000 and 4 August 2004 under the Criminal Law Act 1977.
Under the Terrorism Act police had a deadline of Tuesday afternoon to charge them or release them, having questioned them for a fortnight.
They were arrested with four other men in raids across England, including Blackburn, Luton, and London.
Two of the 13 arrested on 3 August were freed without charge; two more are no longer being questioned under the Terrorism Act but were rearrested on suspicion of other offences.
Three of the nine charged on Tuesday were also charged under the Terrorism Act 2000.
EIGHT MEN CHARGED
Dhiren Barot, 32, from Willesden, London
Mohammed Naveed Bhatti, 24, from Harrow, Middlesex
Abdul Aziz Jalil, 31, from Luton
Omar Abdul Rehman, 20, from Bushey, Hertfordshire
Junade Feroze, 28, from Blackburn
Zia Ul Haq, 25, from Paddington, London
Qaisar Shaffi, 25, from Willesden
Nadeem Tarmohammed, 26, also from Willesden
Dhiren Barot was charged with possessing reconnaissance plans of the Stock Exchange in New York, the IMF in Washington, and the Citigroup in New York and having notebooks with information on explosives, poisons, chemicals and related matters.
He was also charged with possessing a reconnaissance plan of the Prudential Building in New Jersey, US.
Nadeem Tarmohammed was also charged with the Prudential building offence.
The plans contained "information of a kind likely to be useful to a person committing or preparing an act of terrorism contrary to Section 58 of the Terrorism Act 2000," police said.
Qaisar Shaffi was charged with having an extract of the Terrorist's Handbook, Scotland Yard said.
It was unclear which court the ninth man, Matthew Monks, 32, of Sudbury, London, would appear in and a date for his court appearance has not been set.