Enter Your friend's email address here For those interested, a list of new stories and photos can be emailed to you . Simply put in your email address below . Launching them made quite a boom . They were light in weight , but very hard .
All measurements are approximate , from memory .
I estimate their capacity at 3 to 4 liters . However , myself and most of the people doused were immediately overwhelmed by the effects one gets with OC and OC-tear gas . Ultimately , the water cannon were not terribly effective , as they had to aim at people's feet and hydroplane them over . The perimeter openings were the only place a protester had a chance of being seen or heard by FTAA participants . Journalists alike were punished just for being present .