Six men planned "murderous suicide bombings" on public transport in London on 21 July 2005, a court has heard.
The six are each accused of conspiracy to murder
The prosecution has told Woolwich Crown Court of their alleged "extremist Muslim plot" targeting London two weeks after the 7 July bombings killed 52.
Muktar Ibrahim, Manfo Asiedu, Hussein Osman, Yassin Omar, Ramzi Mohammed and Adel Yahya - all originally from Africa - deny conspiracy to murder.
The six also deny charges of conspiracy to cause explosions.
Muktar Said Ibrahim, 28, from Stoke Newington
Ramzi Mohammed, 25, from North Kensington, west London
Yassin Omar, 26, from New Southgate, north London
Hussein Osman, 28, of no fixed address
Manfo Kwaku Asiedu, 33, of no fixed address
Adel Yahya, 24, of High Road, Tottenham
Prosecutor Nigel Sweeney QC said the men chose a date for their plan "just 14 days after the carnage of July 7".
But the court heard how the conspiracy "had been in existence long before the events of July 7" and did not appear to be some "hastily arranged copycat".
The prosecutor told how six bombs were made using a mix of liquid hydrogen peroxide, chapatti flour, acetone and acid.
Evidence that the alleged bombers had been buying the materials necessary in late April 2005 would form part of the prosecution's case, Mr Sweeney added.
The court was told that one order of hydrogen peroxide placed at a trade shop was so large that a new batch of the substance had to be made especially.
Each bomb was placed in a large plastic container and screws, tacks, washers or nuts, were taped to the outside to "maximise the possibility of injury", he said.
He told the court it was unclear if the bombs had failed to detonate because they had been manufactured incorrectly at the flat or because of hot weather on 21 July affecting the chemicals.
He outlined the case against each defendant, saying all of them were "would-be suicide bombers" except for Mr Yahya, who was out of the country on 21 July 2005.
Mr Sweeney told the court how Mr Mohammed had written a suicide note which was found in pieces after his arrest, and how Mr Asiedu "lost his nerve at the last moment" and dumped his bomb.
The court also heard how Mr Ibrahim had been trained for jihad in the Sudan in 2003 and had also travelled to Pakistan the following year "to take part in jihad or to train for it".
Three of the men - Mr Omar, Mr Yahya and Mr Ibrahim - attended Finsbury Park Mosque, north London, to listen to radical cleric Abu Hamza, Mr Sweeney added.
The three, together with Mr Asiedu and Mr Osman, had also been among a group of 20 or more people on a camping trip to a farm in Cumbria in May, September 2004, he said.
Photographs of them on the last day of their trip by police officers on surveillance, were shown to the jury.
One of the defendants, Mr Omar, fled London after the attempted bombings and got on a coach to Birmingham disguised as a woman wearing a burka, the court heard.
Mr Sweeney said Mr Omar was arrested at a house in Birmingham, where he was found fully dressed standing in a bath with a rucksack on his back.
He said: "The evidence will show, amongst other things, that at the least of it Ibrahim, Omar, Osman and Yahya all held extremist views.
"Second, Ibrahim, Omar and Yahya had all spoken about carrying out jihad."
Hussein Osman was eventually arrested in Rome, where he told police that the plot was a "deliberate hoax", not a serious attempt to kill commuters.
That, between 1 Jan and 30 July 2005, the men conspired together "and with other persons unknown to murder other persons"
That they "maliciously conspired together" to cause "explosions of a nature likely to endanger life or cause serious injury to property"
Mr Sweeney said: "Given the weight of the evidence as to his involvement, what could he say?
"The prosecution case is that this was no hoax."
He added: "The failure of those bombs to explode owed nothing to the intention of these defendants, rather it was simply the good fortune of the travelling public that day that they were spared."
The six men were all known to each other by the summer of 2005, Mr Sweeney said.
The jury heard that Yassin Omar's one-bedroom flat in New Southgate, north London, was a bomb factory, "where the great majority, if not all, of the work required to make those bombs was carried out".
On 22 July 2005 - the day after the alleged bombing attempts - a caretaker at the block of flats found a large number of hydrogen peroxide bottles in communal bins and called police.
The trial at Woolwich Crown Court is expected to last up to four months.