A man has been found guilty of trying to cause "maximum damage" by making a bomb filled with ball bearings and leaving it on a Tube train.
Damon Smith put his homemade device into a rucksack and left it on a Jubilee line train in October.
The 20-year-old had admitted perpetrating a bomb hoax but claimed it was a prank.
Had it worked, the bomb would have exploded just as commuters were leaving the North Greenwich station platform.
Former altar boy Smith built the device with shrapnel and a £2 clock from Tesco after Googling an al-Qaeda article on bomb-making.
The Old Bailey was told the student, who has an autistic spectrum disorder, had a keen interest in guns, bombs and other weapons, which may have been a function of the condition.
His lawyer told the trial he was no "hate-filled jihadi" and never meant to harm anyone.
However, the jury convicted him of making or possessing an explosive substance with intent to endanger life after two hours of deliberations.
The Met said he was not charged under the Terrorism Act because there was not enough evidence that his crime was politically motivated.