An anonymous reader writes: London Mayor Boris Johnson is planning to spend at least £90,000 on truck-mounted water cannons in order to control rioters. While the mayor says he intends to consult citizens about this potential investment before moving ahead, the city has been in the process of training police on the use of water cannons since last summer. Johnson claims that the water cannons would only be used in "extreme" situations; however, those who oppose the idea fear that water cannons will be used to quell peaceful protests, not just riots.
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